Allow resource configuration for APIServer

[dominicgunn]

Changes

• Allows resource configuration for pod deployment.
• Allows configuration for targetRamMb to limit size of watch cache.

[k8s-ci-robot]

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[codecov-io]

Codecov Report

Merging #1746 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1746   +/-   ##
=======================================
  Coverage   25.16%   25.16%           
=======================================
  Files          98       98           
  Lines        5023     5023           
=======================================
  Hits         1264     1264           
  Misses       3617     3617           
  Partials      142      142

Impacted Files	Coverage Δ
pkg/api/cluster.go	0% <ø> (ø)	⬆️

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[davidmccormick]

/lgtm