Add support for pod anti-affinity

[EdgeJ]

Adds functionality to enable pod anti-affinity by matching for the component label against the componentM3DBNode value. This functionality is disabled by default to prevent resource strain on k8s clusters. This change also splits up the functionality of the GenerateStatefulSetAffinity function into two sub-functions handling node affinity and pod anti-affinity.

Fixes #123

[EdgeJ]

Converted to draft, as I realized I forgot to handle topologyKey to match node labels.

[codecov]

Codecov Report

Merging #266 (69160fa) into master (c00c39d) will increase coverage by 0.05%.
The diff coverage is 83.78%.

@@            Coverage Diff             @@
##           master     #266      +/-   ##
==========================================
+ Coverage   75.48%   75.54%   +0.05%     
==========================================
  Files          32       32              
  Lines        2313     2343      +30     
==========================================
+ Hits         1746     1770      +24     
- Misses        425      428       +3     
- Partials      142      145       +3     

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[schallert]

Thanks for the contribution!