chore: make localStorage optional when setting storage state

[Skn0tt]

Follow-up to #34591

[dgozman]

I am surprised that origins and cookies are not optional either. Maybe I was wrong suggesting this change. Perhaps we should do some archeology, or forget about it.

[Skn0tt]

Let's forget about it, we can still do this change in the future.

[github-actions]

Test results for "tests 1"

8 flaky

⚠️ [firefox-page] › tests/page/page-evaluate.spec.ts:403:3 › should throw for too deep reference chain @firefox-ubuntu-22.04-node18
⚠️ [installation tests] › tests/playwright-electron-should-work.spec.ts:44:5 › should work when wrapped inside @playwright/test and trace is enabled @package-installations-macos-latest
⚠️ [webkit-library] › tests/library/browsercontext-clearcookies.spec.ts:72:3 › should remove cookies by name regex @webkit-ubuntu-22.04-node18
⚠️ [webkit-library] › tests/library/defaultbrowsercontext-1.spec.ts:28:3 › context.cookies() should work @smoke @webkit-ubuntu-22.04-node18
⚠️ [webkit-page] › tests/page/elementhandle-screenshot.spec.ts:231:5 › element screenshot › should wait for element to stop moving @webkit-ubuntu-22.04-node18
⚠️ [webkit-page] › tests/page/page-leaks.spec.ts:82:5 › click should not leak @webkit-ubuntu-22.04-node18
⚠️ [webkit-page] › tests/page/page-leaks.spec.ts:161:5 › waitFor should not leak @webkit-ubuntu-22.04-node18
⚠️ [webkit-page] › tests/page/page-set-input-files.spec.ts:147:3 › should upload large file @webkit-ubuntu-22.04-node18

37783 passed, 655 skipped
✔️✔️✔️

Merge workflow run.