fs: restore stack traces of fs/promises readFile and writeFile errors

[vedchaudhari]

Since #65327 and #65489, errors from fs.promises.readFile(), writeFile() and
appendFile() have no stack frames. This affects v26.8.0+ (readFile()) and
v26.9.0+ (writeFile(), appendFile()); v24.x and v22.x aren't affected.

# main
Error: ENOENT: no such file or directory, open '/missing/config.json'

# this PR
Error: ENOENT: no such file or directory, open '/missing/config.json'
    at readFile (node:internal/fs/promises:2301:7)
    at async loadConfig ([eval]:4:3)

The stack was captured from a C++ callback with no JS frames on it. This captures
it after the await instead, like the rest of fs/promises. The success path is
unchanged, and the fs/readfile-promises and fs/writefile-promises benchmarks
show no difference.

Benchmark results

$ node benchmark/compare.js --old ./node-main --new ./node-pr --runs 10 \
    --set duration=1 --filter readfile-promises --filter writefile-promises fs

macOS arm64, 10 runs per binary. p-values are from a Welch's t-test; * marks p < 0.05.

benchmark	configuration	main (ops/s)	this PR (ops/s)	change	p-value
readfile-promises	concurrent=1 len=1024 encoding=''	56,875	57,183	+0.54%	0.49
readfile-promises	concurrent=1 len=1024 encoding='utf-8'	57,179	58,407	+2.15%	0.10
readfile-promises	concurrent=1 len=16777216 encoding=''	749	743	-0.82%	0.76
readfile-promises	concurrent=1 len=16777216 encoding='utf-8'	424	429	+1.24%	0.71
readfile-promises	concurrent=1 len=33554432 encoding=''	331	332	+0.58%	0.67
readfile-promises	concurrent=1 len=33554432 encoding='utf-8'	175	173	-1.25%	0.62
readfile-promises	concurrent=1 len=4194304 encoding=''	3,047	3,056	+0.29%	0.85
readfile-promises	concurrent=1 len=4194304 encoding='utf-8'	2,578	2,627	+1.93%	0.62
readfile-promises	concurrent=1 len=524288 encoding=''	20,307	20,203	-0.51%	0.80
readfile-promises	concurrent=1 len=524288 encoding='utf-8'	17,994	17,918	-0.42%	0.87
readfile-promises	concurrent=1 len=8388608 encoding=''	1,593	1,576	-1.05%	0.64
readfile-promises	concurrent=1 len=8388608 encoding='utf-8'	1,142	1,139	-0.26%	0.93
readfile-promises	concurrent=10 len=1024 encoding=''	184,282	186,444	+1.17%	0.77
readfile-promises	concurrent=10 len=1024 encoding='utf-8'	185,096	177,114	-4.31%	0.23
readfile-promises	concurrent=10 len=16777216 encoding=''	1,564	1,593	+1.87%	0.44
readfile-promises	concurrent=10 len=16777216 encoding='utf-8'	438	437	-0.30%	0.95
readfile-promises	concurrent=10 len=33554432 encoding=''	797	802	+0.59%	0.90
readfile-promises	concurrent=10 len=33554432 encoding='utf-8'	213	203	-4.79%	0.26
readfile-promises	concurrent=10 len=4194304 encoding=''	6,222	6,135	-1.38%	0.32
readfile-promises	concurrent=10 len=4194304 encoding='utf-8'	2,104	2,104	+0.01%	1.00
readfile-promises	concurrent=10 len=524288 encoding=''	29,102	30,652	+5.32%	0.16
readfile-promises	concurrent=10 len=524288 encoding='utf-8'	28,673	27,922	-2.62%	0.63
readfile-promises	concurrent=10 len=8388608 encoding=''	2,931	2,857	-2.52%	0.20
readfile-promises	concurrent=10 len=8388608 encoding='utf-8'	921	913	-0.93%	0.73
writefile-promises	concurrent=1 size=1024 encodingType='asc'	26,216	26,881	+2.54%	0.65
writefile-promises	concurrent=1 size=1024 encodingType='buf'	24,924	26,980	+8.25%	0.30
writefile-promises	concurrent=1 size=1024 encodingType='utf'	25,694	25,851	+0.61%	0.94
writefile-promises	concurrent=1 size=1048576 encodingType='asc'	2,830	2,870	+1.39%	0.78
writefile-promises	concurrent=1 size=1048576 encodingType='buf'	2,868	3,067	+6.94%	0.04 *
writefile-promises	concurrent=1 size=1048576 encodingType='utf'	2,894	2,879	-0.50%	0.93
writefile-promises	concurrent=1 size=2 encodingType='asc'	28,047	27,462	-2.08%	0.60
writefile-promises	concurrent=1 size=2 encodingType='buf'	27,610	28,756	+4.15%	0.46
writefile-promises	concurrent=1 size=2 encodingType='utf'	29,195	28,797	-1.36%	0.69
writefile-promises	concurrent=1 size=65535 encodingType='asc'	21,725	21,700	-0.11%	0.98
writefile-promises	concurrent=1 size=65535 encodingType='buf'	22,605	25,022	+10.69%	0.09
writefile-promises	concurrent=1 size=65535 encodingType='utf'	19,432	20,483	+5.41%	0.44
writefile-promises	concurrent=10 size=1024 encodingType='asc'	28,006	26,607	-5.00%	0.11
writefile-promises	concurrent=10 size=1024 encodingType='buf'	26,818	26,754	-0.24%	0.96
writefile-promises	concurrent=10 size=1024 encodingType='utf'	27,985	26,590	-4.98%	0.19
writefile-promises	concurrent=10 size=1048576 encodingType='asc'	3,049	2,819	-7.52%	0.14
writefile-promises	concurrent=10 size=1048576 encodingType='buf'	2,997	2,851	-4.85%	0.43
writefile-promises	concurrent=10 size=1048576 encodingType='utf'	2,975	2,940	-1.17%	0.80
writefile-promises	concurrent=10 size=2 encodingType='asc'	28,423	27,387	-3.65%	0.14
writefile-promises	concurrent=10 size=2 encodingType='buf'	27,868	27,790	-0.28%	0.94
writefile-promises	concurrent=10 size=2 encodingType='utf'	27,878	27,841	-0.13%	0.98
writefile-promises	concurrent=10 size=65535 encodingType='asc'	24,832	23,330	-6.05%	0.24
writefile-promises	concurrent=10 size=65535 encodingType='buf'	24,651	25,360	+2.88%	0.62
writefile-promises	concurrent=10 size=65535 encodingType='utf'	22,357	22,614	+1.15%	0.80

1 of 48 configurations is under p < 0.05, about what chance alone gives with
48 comparisons. It's a 1 MiB write (+6.9%), which is above kWriteFileMaxChunkSize
(512 KiB) and doesn't go through the changed code.

AI-assisted. I reproduced the bug and ran the tests and benchmarks myself.

cc @codebytere

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.49%. Comparing base (49ad950) to head (6931507).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #66757   +/-   ##
=======================================
  Coverage   90.49%   90.49%           
=======================================
  Files         797      797           
  Lines      277494   277517   +23     
  Branches    53321    53327    +6     
=======================================
+ Hits       251115   251144   +29     
+ Misses      16802    16794    -8     
- Partials     9577     9579    +2     

Files with missing lines	Coverage Δ
lib/internal/fs/promises.js	91.27% <100.00%> (+0.13%)	⬆️

... and 36 files with indirect coverage changes

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