add default toleration in metrics-server secret

[ggpaue]

What this PR does / why we need it

add default toleration in metrics-server secret

Which issue(s) this PR fixes

Fixes #

Describe testing done for PR

Release note

Add control plane toleration to metrics-server

Additional information

Special notes for your reviewer

[github-actions]

Cluster Generation A/B Results:
https://storage.googleapis.com/tkg-clustergen/3553/20221004230354/clustergen.diff.txt
Author/reviewers:
Please review to verify that the effects on the generated cluster configurations are exactly what the PR intended, and give a thumbs-up if so.

[codecov]

Codecov Report

Merging #3553 (9e81dcf) into main (94a4dfb) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3553      +/-   ##
==========================================
+ Coverage   45.28%   45.32%   +0.03%     
==========================================
  Files         370      370              
  Lines       39306    39306              
==========================================
+ Hits        17801    17814      +13     
+ Misses      19894    19884      -10     
+ Partials     1611     1608       -3     

Impacted Files	Coverage Δ
addons/controllers/clusterbootstrap_controller.go	65.45% <0.00%> (+0.59%)	⬆️
...ons/controllers/packageinstallstatus_controller.go	79.15% <0.00%> (+1.15%)	⬆️
addons/controllers/machine_controller.go	68.68% <0.00%> (+3.03%)	⬆️

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[vijaykatam]

Lets fill out the PR template and this should be good to merge.