Cross-link sections about blocking network requests

[mikehoffms]

Rendered article sections for review:

• Network request blocking tool > Block a network request - opens the tool from the Activity Bar. Added See Also link.
  • https://review.learn.microsoft.com/microsoft-edge/devtools-guide-chromium/network-request-blocking/network-request-blocking-tool?branch=pr-en-us-3146#block-a-network-request
  • Before/Live
• Inspect network activity > Block requests - opens the tool from the Command Menu. Added See Also link.
  • https://review.learn.microsoft.com/microsoft-edge/devtools-guide-chromium/network/?branch=pr-en-us-3146#block-requests
  • Before/Live

Docs to block a network request is documented in two different places, one under the Network tool and another under Network request blocking tool. One section uses the Command Menu to access the blocking tool. The other section directly accesses the tool from the Activity bar. Rest of the content is the same.

This PR fixes Issue #2997.

AB#50645322

[learn-build-service-prod]

Learn Build status updates of commit 8c1c9d5:

✅ Validation status: passed

File	Status	Preview URL	Details
microsoft-edge/devtools-guide-chromium/network/index.md	✅Succeeded	View
microsoft-edge/devtools-guide-chromium/network-request-blocking/network-request-blocking-tool.md	✅Succeeded	View

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