feat: enable default cpu burst for shared cores pods

[JustinChengLZ]

What type of PR is this?

• We want to enable default cpu burst for shared cores pods, but only if it is the only shared cores pod in the node

What this PR does / why we need it:

Which issue(s) this PR fixes:

Special notes for your reviewer:

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.76%. Comparing base (d187f9e) to head (3c34870).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1080      +/-   ##
==========================================
- Coverage   60.81%   60.76%   -0.05%     
==========================================
  Files         737      739       +2     
  Lines       69521    69791     +270     
==========================================
+ Hits        42277    42409     +132     
- Misses      22505    22615     +110     
- Partials     4739     4767      +28     

Flag	Coverage Δ
unittest	60.76% <100.00%> (-0.05%)	⬇️

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