[ESLint] Removes image rule as error in Core Web Vitals config

[housseindjirdeh]

There have been multiple instances of the <Image> component not working as well as it should due to some underlying performance issues. Until those issues are resolved, this PR removes recommending its usage over an <img> tag it as an ESLint error in the next/core-web-vitals config. It will only display as a warning.

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
buildDuration	13.3s	12.9s	-390ms
buildDurationCached	3.2s	3.1s	-69ms
nodeModulesSize	49.3 MB	49.3 MB	✓

Page Load Tests Overall increase ✓

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.316	2.317	0
/ avg req/sec	1079.4	1078.92	⚠️ -0.48
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.322	1.279	-0.04
/error-in-render avg req/sec	1891.57	1953.91	+62.34

Client Bundles (main, webpack, commons)

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
359.HASH.js gzip	3.09 kB	3.09 kB	✓
framework-HASH.js gzip	42 kB	42 kB	✓
main-HASH.js gzip	20.6 kB	20.6 kB	✓
webpack-HASH.js gzip	1.49 kB	1.49 kB	✓
Overall change	67.2 kB	67.2 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
polyfills-HASH.js gzip	31.1 kB	31.1 kB	✓
Overall change	31.1 kB	31.1 kB	✓

Client Pages

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
_app-HASH.js gzip	803 B	803 B	✓
_error-HASH.js gzip	3.18 kB	3.18 kB	✓
amp-HASH.js gzip	526 B	526 B	✓
css-HASH.js gzip	329 B	329 B	✓
hooks-HASH.js gzip	903 B	903 B	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	1.65 kB	1.65 kB	✓
routerDirect..HASH.js gzip	322 B	322 B	✓
withRouter-HASH.js gzip	320 B	320 B	✓
bb14e60e810b..30f.css gzip	125 B	125 B	✓
Overall change	8.42 kB	8.42 kB	✓

Client Build Manifests

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
_buildManifest.js gzip	390 B	390 B	✓
Overall change	390 B	390 B	✓

Rendered Page Sizes

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
index.html gzip	523 B	523 B	✓
link.html gzip	537 B	537 B	✓
withRouter.html gzip	515 B	515 B	✓
Overall change	1.57 kB	1.57 kB	✓

---

Webpack 4 Mode (Increase detected ⚠️)

General

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
buildDuration	11.1s	11.7s	⚠️ +568ms
buildDurationCached	4.6s	4.6s	-51ms
nodeModulesSize	49.3 MB	49.3 MB	✓

Page Load Tests Overall increase ✓

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.311	2.309	0
/ avg req/sec	1081.86	1082.54	+0.68
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.29	1.266	-0.02
/error-in-render avg req/sec	1937.84	1974.5	+36.66

Client Bundles (main, webpack, commons)

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
14.HASH.js gzip	3.11 kB	3.11 kB	✓
677f882d2ed8..HASH.js gzip	13.9 kB	13.9 kB	✓
framework.HASH.js gzip	41.8 kB	41.8 kB	✓
main-HASH.js gzip	7.81 kB	7.81 kB	✓
webpack-HASH.js gzip	1.19 kB	1.19 kB	✓
Overall change	67.8 kB	67.8 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
polyfills-HASH.js gzip	31.3 kB	31.3 kB	✓
Overall change	31.3 kB	31.3 kB	✓

Client Pages

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
_app-HASH.js gzip	791 B	791 B	✓
_error-HASH.js gzip	3.83 kB	3.83 kB	✓
amp-HASH.js gzip	531 B	531 B	✓
css-HASH.js gzip	333 B	333 B	✓
hooks-HASH.js gzip	910 B	910 B	✓
index-HASH.js gzip	227 B	227 B	✓
link-HASH.js gzip	1.64 kB	1.64 kB	✓
routerDirect..HASH.js gzip	295 B	295 B	✓
withRouter-HASH.js gzip	292 B	292 B	✓
e025d2764813..52f.css gzip	125 B	125 B	✓
Overall change	8.98 kB	8.98 kB	✓

Client Build Manifests

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
_buildManifest.js gzip	418 B	418 B	✓
Overall change	418 B	418 B	✓

Rendered Page Sizes

	vercel/next.js canary	housseindjirdeh/next.js eslint-remove-image-eslint-rule	Change
index.html gzip	569 B	569 B	✓
link.html gzip	581 B	581 B	✓
withRouter.html gzip	561 B	561 B	✓
Overall change	1.71 kB	1.71 kB	✓

Commit: 2faabf7