Update webpack target to node12.22

[styfle]

Follow up to #29949

[ijjk]

Stats from current PR

Default Build (Decrease detected ✓)

General Overall decrease ✓

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
buildDuration	15s	15.3s	⚠️ +362ms
buildDurationCached	3.5s	3.8s	⚠️ +256ms
nodeModulesSize	199 MB	199 MB	-1 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.535	3.68	⚠️ +0.15
/ avg req/sec	707.26	679.29	⚠️ -27.97
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.795	1.844	⚠️ +0.05
/error-in-render avg req/sec	1392.6	1355.85	⚠️ -36.75

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
779.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	27 kB	27 kB	✓
webpack-HASH.js gzip	1.45 kB	1.45 kB	✓
Overall change	70.9 kB	70.9 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
polyfills-a4..dd70.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
_app-HASH.js gzip	977 B	977 B	✓
_error-HASH.js gzip	194 B	194 B	✓
amp-HASH.js gzip	311 B	311 B	✓
css-HASH.js gzip	328 B	328 B	✓
dynamic-HASH.js gzip	2.67 kB	2.67 kB	✓
head-HASH.js gzip	351 B	351 B	✓
hooks-HASH.js gzip	918 B	918 B	✓
image-HASH.js gzip	4.14 kB	4.14 kB	✓
index-HASH.js gzip	260 B	260 B	✓
link-HASH.js gzip	1.66 kB	1.66 kB	✓
routerDirect..HASH.js gzip	320 B	320 B	✓
script-HASH.js gzip	386 B	386 B	✓
withRouter-HASH.js gzip	319 B	319 B	✓
bb14e60e810b..30f.css gzip	125 B	125 B	✓
Overall change	13 kB	13 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
_buildManifest.js gzip	493 B	493 B	✓
Overall change	493 B	493 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
index.html gzip	540 B	540 B	✓
link.html gzip	551 B	551 B	✓
withRouter.html gzip	533 B	533 B	✓
Overall change	1.62 kB	1.62 kB	✓

---

Default Build with SWC (Increase detected ⚠️)

General Overall decrease ✓

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
buildDuration	8.1s	7.8s	-345ms
buildDurationCached	3.9s	3.7s	-133ms
nodeModulesSize	199 MB	199 MB	-1 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.94	3.741	-0.2
/ avg req/sec	634.56	668.31	+33.75
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	2.067	1.898	-0.17
/error-in-render avg req/sec	1209.69	1317.34	+107.65

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
675-HASH.js gzip	13.8 kB	13.8 kB	✓
770.HASH.js gzip	178 B	178 B	✓
framework-HASH.js gzip	50.8 kB	50.8 kB	✓
main-HASH.js gzip	35.1 kB	35.1 kB	✓
webpack-HASH.js gzip	1.64 kB	1.64 kB	✓
Overall change	101 kB	101 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
polyfills-a4..dd70.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
_app-HASH.js gzip	1.33 kB	1.33 kB	✓
_error-HASH.js gzip	180 B	180 B	✓
amp-HASH.js gzip	315 B	315 B	✓
css-HASH.js gzip	331 B	331 B	✓
dynamic-HASH.js gzip	2.79 kB	2.79 kB	✓
head-HASH.js gzip	355 B	355 B	✓
hooks-HASH.js gzip	637 B	637 B	✓
image-HASH.js gzip	555 B	555 B	✓
index-HASH.js gzip	261 B	261 B	✓
link-HASH.js gzip	2.22 kB	2.22 kB	✓
routerDirect..HASH.js gzip	326 B	326 B	✓
script-HASH.js gzip	393 B	393 B	✓
withRouter-HASH.js gzip	322 B	322 B	✓
bb14e60e810b..30f.css gzip	125 B	125 B	✓
Overall change	10.1 kB	10.1 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
_buildManifest.js gzip	510 B	510 B	✓
Overall change	510 B	510 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js bump-webpack-target-node12.22	Change
index.html gzip	536 B	536 B	✓
link.html gzip	549 B	549 B	✓
withRouter.html gzip	530 B	530 B	✓
Overall change	1.61 kB	1.61 kB	✓

Commit: 5d78d14