chore: page.close -> Close page in steps

[mxschmitt]

This follows what we do for context for consistency reasons:

    close:
      title: Close context
      parameters:
        reason: string?

BrowserContext.close -> Close context.
Page.close -> Close page.

[github-actions]

Test results for "tests 1"

6 flaky

⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:1079:7 › cli codegen › should not throw csp directive violation errors @firefox-ubuntu-22.04-node18
⚠️ [firefox-page] › page/page-wait-for-function.spec.ts:104:3 › should work with strict CSP policy @firefox-ubuntu-22.04-node18
⚠️ [playwright-test] › ui-mode-test-ct.spec.ts:188:5 › should watch component @macos-latest-node18-1
⚠️ [webkit-library] › library/browsercontext-viewport-mobile.spec.ts:97:5 › mobile viewport › should fire orientationchange event @webkit-ubuntu-22.04-node18
⚠️ [webkit-library] › library/trace-viewer.spec.ts:1313:1 › should pick locator in iframe @webkit-ubuntu-22.04-node18
⚠️ [webkit-page] › page/page-screenshot.spec.ts:345:5 › page screenshot › should work while navigating @webkit-ubuntu-22.04-node18

46540 passed, 804 skipped
✔️✔️✔️

Merge workflow run.