feat(tfrun): Add cleanup of past TerraformRuns

[corrieriluca]

167 needs to be merged into main first.

[codecov-commenter]

Codecov Report

Merging #168 (2059601) into main (0d0cd65) will decrease coverage by 1.59%. The diff coverage is 40.74%.

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@@            Coverage Diff             @@
##             main     #168      +/-   ##
==========================================
- Coverage   70.50%   68.92%   -1.59%     
==========================================
  Files          28       28              
  Lines        1926     2034     +108     
==========================================
+ Hits         1358     1402      +44     
- Misses        492      547      +55     
- Partials       76       85       +9     

Files	Coverage Δ
api/v1alpha1/terraformlayer_types.go	16.66% <ø> (ø)
api/v1alpha1/terraformrepository_types.go	100.00% <ø> (ø)
api/v1alpha1/common.go	99.46% <92.30%> (-0.54%)	:arrow_down:
internal/controllers/terraformlayer/controller.go	38.02% <25.00%> (-0.78%)	:arrow_down:
internal/controllers/terraformlayer/run.go	49.15% <34.06%> (-50.85%)	:arrow_down:

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