feat: always use SWC Wasm fallback when running in WebContainer

[d3lm]

What?

Since the Wasm fallback was re-introduced in #57906 I am now also adding a check for detecting WebContainers so that it would always use the SWC Wasm fallback. That's because WebContainers can't execute native binaries.

I decided to not account for NEXT_DISABLE_SWC_WASM because it doesn't make much sense and if someone had this enabled, it would always fail. But if ya all think it's better to take this flag into account then I am happy to change it.

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: 8eaa762

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[ijjk]

Allow CI Workflow Run

• approve CI run for commit: 8eaa762

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: 8eaa762

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: 8eaa762

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[d3lm]

CC @kwonoj @jridgewell

[ijjk]

Stats from current PR

Default Build

General Overall increase ⚠️

	vercel/next.js canary	d3lm/next.js d3lm/add-webcontainer-detection	Change
buildDuration	10.6s	10.7s	N/A
buildDurationCached	6s	6.7s	⚠️ +705ms
nodeModulesSize	175 MB	175 MB	⚠️ +726 B
nextStartRea..uration (ms)	399ms	398ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	d3lm/next.js d3lm/add-webcontainer-detection	Change
199-HASH.js gzip	30.4 kB	30.5 kB	N/A
3f784ff6-HASH.js gzip	53.2 kB	53.2 kB	✓
494.HASH.js gzip	182 B	182 B	✓
framework-HASH.js gzip	45.5 kB	45.5 kB	✓
main-app-HASH.js gzip	254 B	252 B	N/A
main-HASH.js gzip	33 kB	33 kB	N/A
webpack-HASH.js gzip	1.75 kB	1.75 kB	N/A
Overall change	98.9 kB	98.9 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	d3lm/next.js d3lm/add-webcontainer-detection	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	d3lm/next.js d3lm/add-webcontainer-detection	Change
_app-HASH.js gzip	205 B	205 B	✓
_error-HASH.js gzip	182 B	181 B	N/A
amp-HASH.js gzip	505 B	507 B	N/A
css-HASH.js gzip	322 B	323 B	N/A
dynamic-HASH.js gzip	2.59 kB	2.59 kB	N/A
edge-ssr-HASH.js gzip	258 B	259 B	N/A
head-HASH.js gzip	348 B	347 B	N/A
hooks-HASH.js gzip	369 B	368 B	N/A
image-HASH.js gzip	4.38 kB	4.38 kB	N/A
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	2.71 kB	2.7 kB	N/A
routerDirect..HASH.js gzip	318 B	318 B	✓
script-HASH.js gzip	384 B	383 B	N/A
withRouter-HASH.js gzip	319 B	320 B	N/A
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	885 B	885 B	✓

Client Build Manifests

	vercel/next.js canary	d3lm/next.js d3lm/add-webcontainer-detection	Change
_buildManifest.js gzip	483 B	484 B	N/A
Overall change	0 B	0 B	✓

Rendered Page Sizes

	vercel/next.js canary	d3lm/next.js d3lm/add-webcontainer-detection	Change
index.html gzip	528 B	527 B	N/A
link.html gzip	540 B	542 B	N/A
withRouter.html gzip	523 B	522 B	N/A
Overall change	0 B	0 B	✓

Edge SSR bundle Size

	vercel/next.js canary	d3lm/next.js d3lm/add-webcontainer-detection	Change
edge-ssr.js gzip	96.7 kB	96.7 kB	N/A
page.js gzip	141 kB	141 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	d3lm/next.js d3lm/add-webcontainer-detection	Change
middleware-b..fest.js gzip	625 B	625 B	✓
middleware-r..fest.js gzip	148 B	151 B	N/A
middleware.js gzip	24.8 kB	24.8 kB	N/A
edge-runtime..pack.js gzip	1.92 kB	1.92 kB	✓
Overall change	2.55 kB	2.55 kB	✓

Next Runtimes

	vercel/next.js canary	d3lm/next.js d3lm/add-webcontainer-detection	Change
app-page-exp...dev.js gzip	167 kB	167 kB	✓
app-page-exp..prod.js gzip	94.5 kB	94.5 kB	✓
app-page-tur..prod.js gzip	95.2 kB	95.2 kB	✓
app-page-tur..prod.js gzip	89.9 kB	89.9 kB	✓
app-page.run...dev.js gzip	137 kB	137 kB	✓
app-page.run..prod.js gzip	89.2 kB	89.2 kB	✓
app-route-ex...dev.js gzip	23.5 kB	23.5 kB	✓
app-route-ex..prod.js gzip	16.4 kB	16.4 kB	✓
app-route-tu..prod.js gzip	16.4 kB	16.4 kB	✓
app-route-tu..prod.js gzip	16 kB	16 kB	✓
app-route.ru...dev.js gzip	22.9 kB	22.9 kB	✓
app-route.ru..prod.js gzip	16 kB	16 kB	✓
pages-api-tu..prod.js gzip	9.37 kB	9.37 kB	✓
pages-api.ru...dev.js gzip	9.64 kB	9.64 kB	✓
pages-api.ru..prod.js gzip	9.37 kB	9.37 kB	✓
pages-turbo...prod.js gzip	21.5 kB	21.5 kB	✓
pages.runtim...dev.js gzip	22.2 kB	22.2 kB	✓
pages.runtim..prod.js gzip	21.5 kB	21.5 kB	✓
server.runti..prod.js gzip	48.5 kB	48.5 kB	✓
Overall change	926 kB	926 kB	✓

Commit: fdf5781

[ijjk]

Tests Passed