[7.x] [APM] Add link-to/transaction route (#101731)

[kibanamachine]

Backports the following commits to 7.x:

• [APM] Add link-to/transaction route ([APM] Add link-to/transaction route #101731)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: f5a4f79
• Storybooks Preview

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
apm	1600	1601	+1

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
apm	4.3MB	4.3MB	+1.3KB

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

cc @dgieselaar