IntegrationSink: rek-test templating support for bool annotations

[matzew]

Fixes #

Proposed Changes

• as per title

Pre-review Checklist

• At least 80% unit test coverage
• E2E tests for any new behavior
• Docs PR for any user-facing impact
• Spec PR for any new API feature
• Conformance test for any change to the spec

Release Note

Docs

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: matzew

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• test/OWNERS [matzew]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.23%. Comparing base (7176ce6) to head (f429a3b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8342   +/-   ##
=======================================
  Coverage   64.23%   64.23%           
=======================================
  Files         390      390           
  Lines       23248    23248           
=======================================
  Hits        14934    14934           
  Misses       7520     7520           
  Partials      794      794           

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[creydr]

/lgtm