Ensure @babel/core is de-duped when nccing

[ijjk]

This ensures @babel/core is de-duped correctly in the ncc'd babel packages by separating the ncc steps for @babel/core and the babel packages so that @babel/core can be marked as an external to the ncc'd output correctly. This fixes an OOM error that was occurring while running the test/unit/next-babel-loader.unit.test.js test on macOS after upgrading the babel packages in #28174

[ijjk]

Stats from current PR

Default Build (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
buildDuration	16.1s	17.1s	⚠️ +985ms
buildDurationCached	8.3s	3.7s	-4.6s
nodeModulesSize	61.5 MB	61.7 MB	⚠️ +249 kB

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.865	2.951	⚠️ +0.09
/ avg req/sec	872.49	847.29	⚠️ -25.2
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.696	1.701	⚠️ +0.01
/error-in-render avg req/sec	1473.99	1469.6	⚠️ -4.39

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
745.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	23.3 kB	23.3 kB	✓
webpack-HASH.js gzip	1.45 kB	1.45 kB	✓
Overall change	67.1 kB	67.1 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
polyfills-a4..dd70.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
_app-HASH.js gzip	979 B	979 B	✓
_error-HASH.js gzip	194 B	194 B	✓
amp-HASH.js gzip	312 B	312 B	✓
css-HASH.js gzip	329 B	329 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	261 B	261 B	✓
link-HASH.js gzip	1.66 kB	1.66 kB	✓
routerDirect..HASH.js gzip	318 B	318 B	✓
script-HASH.js gzip	387 B	387 B	✓
withRouter-HASH.js gzip	320 B	320 B	✓
bb14e60e810b..30f.css gzip	125 B	125 B	✓
Overall change	13 kB	13 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
_buildManifest.js gzip	491 B	491 B	✓
Overall change	491 B	491 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
index.html gzip	539 B	539 B	✓
link.html gzip	552 B	552 B	✓
withRouter.html gzip	534 B	534 B	✓
Overall change	1.63 kB	1.63 kB	✓

---

Webpack 4 Mode (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
buildDuration	13.8s	13.8s	-19ms
buildDurationCached	5.7s	5.6s	-82ms
nodeModulesSize	61.5 MB	61.7 MB	⚠️ +249 kB

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.936	2.98	⚠️ +0.04
/ avg req/sec	851.54	838.94	⚠️ -12.6
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.648	1.657	⚠️ +0.01
/error-in-render avg req/sec	1516.67	1508.47	⚠️ -8.2

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
16.HASH.js gzip	186 B	186 B	✓
677f882d2ed8..HASH.js gzip	14.1 kB	14.1 kB	✓
framework.HASH.js gzip	41.9 kB	41.9 kB	✓
main-HASH.js gzip	10.6 kB	10.6 kB	✓
webpack-HASH.js gzip	1.19 kB	1.19 kB	✓
Overall change	68 kB	68 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
polyfills-a4..dd70.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
_app-HASH.js gzip	964 B	964 B	✓
_error-HASH.js gzip	3.8 kB	3.8 kB	✓
amp-HASH.js gzip	552 B	552 B	✓
css-HASH.js gzip	333 B	333 B	✓
dynamic-HASH.js gzip	2.87 kB	2.87 kB	✓
head-HASH.js gzip	3.06 kB	3.06 kB	✓
hooks-HASH.js gzip	924 B	924 B	✓
index-HASH.js gzip	231 B	231 B	✓
link-HASH.js gzip	1.64 kB	1.64 kB	✓
routerDirect..HASH.js gzip	298 B	298 B	✓
script-HASH.js gzip	3 kB	3 kB	✓
withRouter-HASH.js gzip	295 B	295 B	✓
30809af5c834..565.css gzip	125 B	125 B	✓
Overall change	18.1 kB	18.1 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
_buildManifest.js gzip	501 B	501 B	✓
Overall change	501 B	501 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js fix/babel-nccing	Change
index.html gzip	586 B	586 B	✓
link.html gzip	597 B	597 B	✓
withRouter.html gzip	578 B	578 B	✓
Overall change	1.76 kB	1.76 kB	✓

Commit: 533a8b5