Fix image-optimizer requires in next-server

[ijjk]

This ensures we don't attempt requiring image-optimizer when it was configured to not include it e.g. when deployed on Vercel or similar environments, this also updates our test to ensure we don't regress on this.

Bug

• Related issues linked using fixes #number
• Integration tests added
• Errors have helpful link attached, see contributing.md

Fixes: #34134

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js fix/image-optimizer-check	Change
buildDuration	15.3s	15.5s	⚠️ +267ms
buildDurationCached	6s	6.1s	⚠️ +73ms
nodeModulesSize	359 MB	359 MB	⚠️ +386 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	ijjk/next.js fix/image-optimizer-check	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.162	3.114	-0.05
/ avg req/sec	790.6	802.76	+12.16
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.359	1.339	-0.02
/error-in-render avg req/sec	1839.05	1867.65	+28.6

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js fix/image-optimizer-check	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42 kB	42 kB	✓
main-HASH.js gzip	27.9 kB	27.9 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	71.5 kB	71.5 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js fix/image-optimizer-check	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js fix/image-optimizer-check	Change
_app-HASH.js gzip	1.36 kB	1.36 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	2.57 kB	2.57 kB	✓
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	919 B	919 B	✓
image-HASH.js gzip	5.01 kB	5.01 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	2.26 kB	2.26 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	14.7 kB	14.7 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js fix/image-optimizer-check	Change
_buildManifest.js gzip	459 B	459 B	✓
Overall change	459 B	459 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js fix/image-optimizer-check	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 (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js fix/image-optimizer-check	Change
buildDuration	18.8s	18.9s	⚠️ +131ms
buildDurationCached	6s	6.1s	⚠️ +59ms
nodeModulesSize	359 MB	359 MB	⚠️ +386 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	ijjk/next.js fix/image-optimizer-check	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.156	3.084	-0.07
/ avg req/sec	792.14	810.68	+18.54
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.385	1.332	-0.05
/error-in-render avg req/sec	1805.18	1877.49	+72.31

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js fix/image-optimizer-check	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.1 kB	42.1 kB	✓
main-HASH.js gzip	27.9 kB	27.9 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	ijjk/next.js fix/image-optimizer-check	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js fix/image-optimizer-check	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	2.56 kB	2.56 kB	✓
head-HASH.js gzip	342 B	342 B	✓
hooks-HASH.js gzip	911 B	911 B	✓
image-HASH.js gzip	5.05 kB	5.05 kB	✓
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	2.28 kB	2.28 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	14.7 kB	14.7 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js fix/image-optimizer-check	Change
_buildManifest.js gzip	458 B	458 B	✓
Overall change	458 B	458 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js fix/image-optimizer-check	Change
index.html gzip	534 B	534 B	✓
link.html gzip	547 B	547 B	✓
withRouter.html gzip	528 B	528 B	✓
Overall change	1.61 kB	1.61 kB	✓

Commit: 9fe8dbe