feat(trace-viewer): Show count in network details sections

[cpAdm]

References: #35214

[cpAdm]

Bit off-topic, I am a bit stuck on other issue, maybe someone can take a look there?
#37963 (comment)

[github-actions]

Test results for "MCP"

1 failed
❌ [webkit] › mcp/video.spec.ts:21 › should work with --save-video (persistent) @mcp-ubuntu-latest

2609 passed, 116 skipped

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Merge workflow run.

[github-actions]

Test results for "tests 1"

5 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-emulate-media.spec.ts:144 › should keep reduced motion and color emulation after reload `@firefox-ubuntu-22.04-node18`
⚠️ [webkit-library] › library/browsercontext-cookies-third-party.spec.ts:319 › add 'Partitioned;' cookie via API `@webkit-ubuntu-22.04-node18`
⚠️ [webkit-library] › library/proxy.spec.ts:125 › should authenticate `@webkit-ubuntu-22.04-node18`
⚠️ [webkit-library] › library/video.spec.ts:378 › screencast › should capture navigation `@webkit-ubuntu-22.04-node18`

40324 passed, 787 skipped

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Merge workflow run.