dillon1000/react

fix[devtools/e2e]: fixed source inspection in e2e tests (#28518)

DevTools e2e tests started to fail after landing
https://github.com/facebook/react/pull/28471:
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https://app.circleci.com/pipelines/github/facebook/react/50984/workflows/a7be25ed-9547-40e9-87bd-b14d9d2e87da/jobs/798270
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https://app.circleci.com/pipelines/github/facebook/react/50984/workflows/a7be25ed-9547-40e9-87bd-b14d9d2e87da/jobs/798275
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https://app.circleci.com/pipelines/github/facebook/react/50984/workflows/a7be25ed-9547-40e9-87bd-b14d9d2e87da/jobs/798271
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https://app.circleci.com/pipelines/github/facebook/react/50984/workflows/a7be25ed-9547-40e9-87bd-b14d9d2e87da/jobs/798274
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https://app.circleci.com/pipelines/github/facebook/react/50984/workflows/a7be25ed-9547-40e9-87bd-b14d9d2e87da/jobs/798269

There are 2 reasons for that:
1. Versions 16.0 and 16.5 use legacy renderer, which doesn't support
source inspection by design:

https://github.com/facebook/react/blob/850fac4915864a487e7cb9ecae8a75dbac144174/packages/react-devtools-shared/src/backend/legacy/renderer.js#L831

The corresponding e2e test is now gated for versions >=16.8
2. For other versions (>=16.8), the source is actually
`e2e-app-regression.js`, because these regression tests open a different
page (not the one we open for tests against React from source)

https://github.com/facebook/react/blob/850fac4915864a487e7cb9ecae8a75dbac144174/packages/react-devtools-inline/playwright.config.js#L15-L17