fix: disable memory cache when intercepting in webkit

[Yury Semikhatsky (yury-s)]

Related to #28414

[github-actions]

Test results for "tests 1"

7 flaky

⚠️ [chromium] › library/tracing.spec.ts:239:5 › should not include trace resources from the previous chunks
⚠️ [firefox] › library/tracing.spec.ts:239:5 › should not include trace resources from the previous chunks
⚠️ [firefox] › page/page-goto.spec.ts:112:3 › should work with Cross-Origin-Opener-Policy after redirect
⚠️ [chromium] › library/tracing.spec.ts:239:5 › should not include trace resources from the previous chunks
⚠️ [playwright-test] › ui-mode-test-screencast.spec.ts:21:5 › should show screenshots
⚠️ [webkit] › library/browsercontext-reuse.spec.ts:50:1 › should reset serviceworker
⚠️ [webkit] › library/tracing.spec.ts:239:5 › should not include trace resources from the previous chunks

26206 passed, 612 skipped
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Merge workflow run.