chore(security): Remove duplicated Semgrep checks [SEC-27366]

[swyrwiak-cu]

For repositories in SOC2 scope, we move into a ruleset that uses time-loop/github-actions/blob/main/.github/workflows/semgrep.yml as explained in GitHub Governance v2.

We are removing any semgrep definition directly inside repository workflows.
Repositories that are not in SOC2 scope will be handled through managed scans.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.37%. Comparing base (9240e29) to head (95a468b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #299      +/-   ##
==========================================
- Coverage   99.38%   99.37%   -0.02%     
==========================================
  Files          17       16       -1     
  Lines        2272     2223      -49     
  Branches      138       91      -47     
==========================================
- Hits         2258     2209      -49     
  Misses         14       14              

Files with missing lines	Coverage Δ
src/clickup-cdk.ts	97.00% <ø> (-0.02%)	⬇️
src/clickup-ts.ts	100.00% <ø> (ø)

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