fix: allow relative userDataDir

[mxschmitt]

A relative directory in Chromium's user-data-dir argument ends up getting resolved against the directory of chrome.exe rather than the CWD on Windows.

Relates https://chromium-review.googlesource.com/c/chromium/src/+/2717314

Fixes #34700

[yury-s]

Why don't we need to resolve it in the other two browsers?

[mxschmitt]

Why don't we need to resolve it in the other two browsers?

Only Chromium on Windows behaved weirdly - moved it a layer up to normalise it everywhere!

[dgozman]

Welcome to the happy linting days!

[github-actions]

Test results for "tests 1"

15 flaky

⚠️ [firefox-page] › tests/page/page-evaluate.spec.ts:403:3 › should throw for too deep reference chain @firefox-ubuntu-22.04-node18
⚠️ [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/browsercontext-har.spec.ts:455:3 › should update har.zip for page @webkit-ubuntu-22.04-node18
⚠️ [webkit-library] › tests/library/browsertype-connect.spec.ts:576:5 › launchServer › should properly disconnect when connection closes from the client side @webkit-ubuntu-22.04-node18
⚠️ [webkit-library] › tests/library/proxy.spec.ts:93:11 › should proxy local network requests › by default › localhost @webkit-ubuntu-22.04-node18
⚠️ [webkit-library] › tests/library/trace-viewer.spec.ts:224:1 › should complain about newer version of trace in old viewer @webkit-ubuntu-22.04-node18
⚠️ [webkit-library] › tests/library/trace-viewer.spec.ts:1133:1 › should display language-specific locators @webkit-ubuntu-22.04-node18
⚠️ [webkit-library] › tests/library/trace-viewer.spec.ts:1336:1 › should highlight locator in iframe while typing @webkit-ubuntu-22.04-node18
⚠️ [webkit-library] › tests/library/trace-viewer.spec.ts:1551:1 › should not leak recorders @webkit-ubuntu-22.04-node18
⚠️ [webkit-page] › tests/page/page-event-popup.spec.ts:28:3 › should work with window features @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:107:5 › fill 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-screenshot.spec.ts:345:5 › page screenshot › should work while navigating @webkit-ubuntu-22.04-node18
⚠️ [playwright-test] › tests/ui-mode-test-watch.spec.ts:145:5 › should watch all @windows-latest-node18-1

37841 passed, 654 skipped
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Merge workflow run.