Drop browser field for edge runtime

[huozhi]

Related to #31678

For streaming pages,

Nodejs runtime: setting global runtime to "nodejs" will work with default module resolution.
Edge runtime: previously next.js will pick up browser field since it's the "similar" asset (unlike nodejs) to edge runtime but browser specific things like DOM api could breaks cause edge runtime is more like worker without dom runtime.

This PR is to revert the main field resolution behavior. And if you have a library targeting multiple runtime with different fields, ideally is to make it more isomorphic and will be easy to use in edge runtime

[shuding]

It seems that node_modules was unexpectedly committed, or intended (as a mock)?

[huozhi]

@shuding it's intended for new test case: a lib with both module field and browser field and we pick the module field export

[ijjk]

Stats from current PR

Default Build (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
buildDuration	16.2s	16.1s	-78ms
buildDurationCached	6.3s	6.2s	-51ms
nodeModulesSize	456 MB	456 MB	⚠️ +110 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.235	3.232	0
/ avg req/sec	772.77	773.4	+0.63
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.394	1.43	⚠️ +0.04
/error-in-render avg req/sec	1793.8	1748.62	⚠️ -45.18

Client Bundles (main, webpack)

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
925.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42 kB	42 kB	✓
main-HASH.js gzip	28 kB	28 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	71.6 kB	71.6 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
_app-HASH.js gzip	1.36 kB	1.36 kB	✓
_error-HASH.js gzip	192 B	192 B	✓
amp-HASH.js gzip	309 B	309 B	✓
css-HASH.js gzip	327 B	327 B	✓
dynamic-HASH.js gzip	2.57 kB	2.57 kB	✓
head-HASH.js gzip	351 B	351 B	✓
hooks-HASH.js gzip	920 B	920 B	✓
image-HASH.js gzip	5.48 kB	5.48 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	2.26 kB	2.26 kB	✓
routerDirect..HASH.js gzip	320 B	320 B	✓
script-HASH.js gzip	387 B	387 B	✓
withRouter-HASH.js gzip	319 B	319 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	15.2 kB	15.2 kB	✓

Client Build Manifests

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
_buildManifest.js gzip	460 B	460 B	✓
Overall change	460 B	460 B	✓

Rendered Page Sizes

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
index.html gzip	531 B	531 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	526 B	526 B	✓
Overall change	1.6 kB	1.6 kB	✓

---

Default Build with SWC

General Overall increase ⚠️

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
buildDuration	19.4s	19.1s	-315ms
buildDurationCached	6.4s	6.4s	⚠️ +66ms
nodeModulesSize	456 MB	456 MB	⚠️ +110 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.143	3.155	⚠️ +0.01
/ avg req/sec	795.36	792.44	⚠️ -2.92
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.389	1.383	-0.01
/error-in-render avg req/sec	1799.89	1807.08	+7.19

Client Bundles (main, webpack)

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
925.HASH.js gzip	178 B	178 B	✓
framework-HASH.js gzip	42.3 kB	42.3 kB	✓
main-HASH.js gzip	28.2 kB	28.2 kB	✓
webpack-HASH.js gzip	1.45 kB	1.45 kB	✓
Overall change	72.1 kB	72.1 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
_app-HASH.js gzip	1.35 kB	1.35 kB	✓
_error-HASH.js gzip	179 B	179 B	✓
amp-HASH.js gzip	313 B	313 B	✓
css-HASH.js gzip	324 B	324 B	✓
dynamic-HASH.js gzip	2.56 kB	2.56 kB	✓
head-HASH.js gzip	351 B	351 B	✓
hooks-HASH.js gzip	921 B	921 B	✓
image-HASH.js gzip	5.59 kB	5.59 kB	✓
index-HASH.js gzip	261 B	261 B	✓
link-HASH.js gzip	2.33 kB	2.33 kB	✓
routerDirect..HASH.js gzip	322 B	322 B	✓
script-HASH.js gzip	388 B	388 B	✓
withRouter-HASH.js gzip	317 B	317 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	15.3 kB	15.3 kB	✓

Client Build Manifests

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
_buildManifest.js gzip	458 B	458 B	✓
Overall change	458 B	458 B	✓

Rendered Page Sizes

	vercel/next.js canary	huozhi/next.js edge/drop-browser-field	Change
index.html gzip	530 B	530 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	525 B	525 B	✓
Overall change	1.6 kB	1.6 kB	✓

Commit: d0406bc