chore(bidi): don't accept page in firefox launch arguments

[hbenl]

Fixes the following tests in Firefox:

• tests/library/browsertype-launch.spec.ts:
  • "should throw if page argument is passed"
• tests/library/defaultbrowsercontext-2.spec.ts:
  • "should throw if page argument is passed"

[github-actions]

Test results for "tests 1"

4 flaky

⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:1079 › cli codegen › should not throw csp directive violation errors `@firefox-ubuntu-22.04-node18`
⚠️ [firefox-page] › page/page-wait-for-function.spec.ts:104 › should work with strict CSP policy `@firefox-ubuntu-22.04-node18`
⚠️ [playwright-test] › ui-mode-test-output.spec.ts:80 › should show console messages for test `@macos-latest-node18-1`
⚠️ [playwright-test] › ui-mode-test-output.spec.ts:117 › should collapse repeated console messages for test `@macos-latest-node18-1`

46876 passed, 821 skipped

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Merge workflow run.