provisioner: Increase CPU limit for shutdown-manager

[tsaarni]

When using the Contour Gateway Provisioner, the shutdown-manager container was reported to experience CPU throttling because the default limit (50m) was too low for some environments.

This change increases the CPU limit to 200m. This hopefully fixes the throttling without needing any configuration changes from users. This limit is high, but it shouldn't cause problems because the shutdown-manager logic is very simple and it is unlikely to start e.g. running in a busy loop. I kept the request unchanged, so the change should not impact e.g. dimensioning of resources.

This PR doesn't make the limits or requests configurable for users.

Updates #7366

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.76%. Comparing base (07a2134) to head (dc3b19a).
⚠️ Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7382      +/-   ##
==========================================
- Coverage   81.85%   81.76%   -0.09%     
==========================================
  Files         130      130              
  Lines       15747    15747              
==========================================
- Hits        12889    12876      -13     
  Misses       2574     2574              
- Partials      284      297      +13     

Files with missing lines	Coverage Δ
...nternal/provisioner/objects/dataplane/dataplane.go	84.03% <ø> (-3.65%)	⬇️

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.