Update flakey build trace case

[ijjk]

This updates to tolerate ENOENT during build tracing as this can expectedly occur since we run static optimization in parallel to the tracing which static generation can remove server files and replace them with their HTML files.

x-ref: https://github.com/vercel/next.js/actions/runs/6581290033/job/17880939489?pr=57088

[ijjk]

Stats from current PR

Default Build

General

	vercel/next.js canary	vercel/next.js update/flakey-trace-case	Change
buildDuration	10.4s	10.4s	N/A
buildDurationCached	5.9s	6s	⚠️ +119ms
nodeModulesSize	174 MB	174 MB	N/A
nextStartRea..uration (ms)	519ms	514ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	vercel/next.js update/flakey-trace-case	Change
199-HASH.js gzip	27.5 kB	27.5 kB	✓
3f784ff6-HASH.js gzip	53.3 kB	53.3 kB	✓
99.HASH.js gzip	182 B	182 B	✓
framework-HASH.js gzip	45.3 kB	45.3 kB	✓
main-app-HASH.js gzip	252 B	252 B	✓
main-HASH.js gzip	32.9 kB	32.9 kB	N/A
webpack-HASH.js gzip	1.75 kB	1.75 kB	N/A
Overall change	127 kB	127 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js update/flakey-trace-case	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js update/flakey-trace-case	Change
_app-HASH.js gzip	206 B	205 B	N/A
_error-HASH.js gzip	182 B	180 B	N/A
amp-HASH.js gzip	506 B	505 B	N/A
css-HASH.js gzip	322 B	323 B	N/A
dynamic-HASH.js gzip	2.57 kB	2.57 kB	N/A
edge-ssr-HASH.js gzip	260 B	259 B	N/A
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	369 B	369 B	✓
image-HASH.js gzip	4.36 kB	4.36 kB	N/A
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	2.64 kB	2.63 kB	N/A
routerDirect..HASH.js gzip	312 B	311 B	N/A
script-HASH.js gzip	385 B	384 B	N/A
withRouter-HASH.js gzip	307 B	308 B	N/A
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	1.08 kB	1.08 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js update/flakey-trace-case	Change
_buildManifest.js gzip	484 B	482 B	N/A
Overall change	0 B	0 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js update/flakey-trace-case	Change
index.html gzip	528 B	529 B	N/A
link.html gzip	543 B	542 B	N/A
withRouter.html gzip	524 B	524 B	✓
Overall change	524 B	524 B	✓

Edge SSR bundle Size

	vercel/next.js canary	vercel/next.js update/flakey-trace-case	Change
edge-ssr.js gzip	93.7 kB	93.7 kB	N/A
page.js gzip	155 kB	155 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	vercel/next.js update/flakey-trace-case	Change
middleware-b..fest.js gzip	623 B	626 B	N/A
middleware-r..fest.js gzip	150 B	151 B	N/A
middleware.js gzip	22.5 kB	22.5 kB	N/A
edge-runtime..pack.js gzip	1.92 kB	1.92 kB	✓
Overall change	1.92 kB	1.92 kB	✓

Commit: 6c1e9e5