Make CI build cache key more specific

[ijjk]

When re-running the test workflow the build cache isn't updated since the existing key already exists since we only use the commit SHA currently, this adds the run_number and run_attempt from https://docs.github.com/en/actions/learn-github-actions/contexts#github-context to ensure separate build caches are used for re-runs.

[styfle]

Nice find!

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
buildDuration	18.1s	18.2s	⚠️ +103ms
buildDurationCached	3.3s	3.4s	⚠️ +57ms
nodeModulesSize	347 MB	347 MB	⚠️ +8 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.965	2.984	⚠️ +0.02
/ avg req/sec	843.25	837.83	⚠️ -5.42
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.357	1.345	-0.01
/error-in-render avg req/sec	1842.25	1859.28	+17.03

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	28.4 kB	28.4 kB	✓
webpack-HASH.js gzip	1.45 kB	1.45 kB	✓
Overall change	72.3 kB	72.3 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
_app-HASH.js gzip	1.37 kB	1.37 kB	✓
_error-HASH.js gzip	194 B	194 B	✓
amp-HASH.js gzip	312 B	312 B	✓
css-HASH.js gzip	326 B	326 B	✓
dynamic-HASH.js gzip	2.38 kB	2.38 kB	✓
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	635 B	635 B	✓
image-HASH.js gzip	4.49 kB	4.49 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	1.87 kB	1.87 kB	✓
routerDirect..HASH.js gzip	321 B	321 B	✓
script-HASH.js gzip	383 B	383 B	✓
withRouter-HASH.js gzip	318 B	318 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	13.3 kB	13.3 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
_buildManifest.js gzip	460 B	460 B	✓
Overall change	460 B	460 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
index.html gzip	532 B	532 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	527 B	527 B	✓
Overall change	1.6 kB	1.6 kB	✓

---

Default Build with SWC (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
buildDuration	19.7s	18.8s	-869ms
buildDurationCached	3.2s	3.1s	-115ms
nodeModulesSize	347 MB	347 MB	⚠️ +8 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.899	2.714	-0.19
/ avg req/sec	862.34	921.16	+58.82
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.391	1.307	-0.08
/error-in-render avg req/sec	1796.66	1912.39	+115.73

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.3 kB	42.3 kB	✓
main-HASH.js gzip	28.6 kB	28.6 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	72.5 kB	72.5 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
_app-HASH.js gzip	1.35 kB	1.35 kB	✓
_error-HASH.js gzip	180 B	180 B	✓
amp-HASH.js gzip	305 B	305 B	✓
css-HASH.js gzip	321 B	321 B	✓
dynamic-HASH.js gzip	2.37 kB	2.37 kB	✓
head-HASH.js gzip	342 B	342 B	✓
hooks-HASH.js gzip	622 B	622 B	✓
image-HASH.js gzip	4.53 kB	4.53 kB	✓
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	1.9 kB	1.9 kB	✓
routerDirect..HASH.js gzip	314 B	314 B	✓
script-HASH.js gzip	375 B	375 B	✓
withRouter-HASH.js gzip	309 B	309 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	13.3 kB	13.3 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
_buildManifest.js gzip	458 B	458 B	✓
Overall change	458 B	458 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js update/build-cache-key	Change
index.html gzip	531 B	531 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	525 B	525 B	✓
Overall change	1.6 kB	1.6 kB	✓

Commit: 1310c5a