Swap current CodeQL workflow to use the C3K extension.

Priority 1:

• arcade/main: Use CodeQL 3000 instead of Guardian #11155
  Test run: https://dnceng.visualstudio.com/internal/_build/results?buildId=2016359&view=results

• arcade/release-6.0: Move from Guardian to CodeQL 3000 version of CodeQL execution #11218
  Test run: https://dnceng.visualstudio.com/internal/_build/results?buildId=2017641&view=results

• arcade/release-7.0: Set up Codeql 3000 pipeline for Arcade release/7.0 #11216
  Test run: https://dnceng.visualstudio.com/internal/_build/results?buildId=2017640&view=results

• arcade-services: Changes to enable TSA reporting for CodeQL runs arcade-services#2053
  Test run: https://dnceng.visualstudio.com/internal/_build/results?buildId=2017647&view=logs&j=179e7e63-bd3a-519a-2d5e-221496da915a

• dotnet-helix-service: https://dnceng.visualstudio.com/internal/_git/dotnet-helix-service/pullrequest/26638
  Test run: https://dnceng.visualstudio.com/internal/_build/results?buildId=2017701&view=logs&j=17b0a9f0-33a0-5d1c-11b5-282e644826af

• dotnet-helix-machines: https://dnceng.visualstudio.com/internal/_git/dotnet-helix-machines/pullrequest/26632
  Test run: https://dnceng.visualstudio.com/internal/_build/results?buildId=2017686&view=results
  (Waiting on PR to merge, test run looks good)

Priority 2:

• xharness: Fixup TSAEnabled variable to have a value for CodeQL runs xharness#965
  Test run: https://dnceng.visualstudio.com/internal/_build/results?buildId=2017951&view=results
• xliff-tasks: Fixups to enable TSA reporting for CodeQL runs.  xliff-tasks#669
  Test run: https://dnceng.visualstudio.com/internal/_build/results?buildId=2017847&view=logs&j=12f1170f-54f2-53f3-20dd-22fc7dff55f9
• arcade-extensions: Set pipeline variable to enable TSA reporting arcade-extensions#57
  Test run: https://dnceng.visualstudio.com/internal/_build/results?buildId=2017849&view=results
• source-indexer: https://github.com/dotnet/source-indexer/pull/108/files
  Test run: https://dnceng.visualstudio.com/internal/_build/results?buildId=2017886&view=results
• dotnet-migrate-package: https://dnceng.visualstudio.com/internal/_git/dotnet-migrate-package/pullrequest/26640?_a=files
  Test run: https://dnceng.visualstudio.com/internal/_build/results?buildId=2017852&view=results