Updates to cluster tests

[omus]

When running the cluster integration tests I was seeing issues with errors such as resource "NotFound". This turned out to be that the job TTL was cleaning up resources before the tests validated the results. I've since switched to deleting the resources manually to avoid such a scenario. This also as the added benefit of removing resources immediately when tests pass.

Additionally, having users specify eval $(minikube docker-env) before running the tests is easy to miss so I added some code to do that for the user.

[omus]

The "pending-timeout" test is failing for me locally with this error being reported on the manager:

nested task error: KubeError: Warning: spec.containers[0].resources.limits[memory]: fractional byte value "1Ei" is invalid, must be an integer
        Warning: spec.containers[0].resources.requests[memory]: fractional byte value "1Ei" is invalid, must be an integer

This is odd as it used to work with the tests were originally written. I feel like this is a K8s server version difference which makes me think we should be testing against multiple versions of Kubernetes clusters

[omus]

Using manusa/actions-setup-minikube@v2.4.0 now reports this error:

Error: Unsupported OS, action only works in Ubuntu 18 or 20

[omus]

Pulled in changes from #95

[omus]

Ugh, GitHub actions are now having problems

[codecov[bot]]

Codecov Report

Merging #96 (1043eb2) into main (426c2bd) will increase coverage by 17.75%. The diff coverage is n/a.

@@             Coverage Diff             @@
##             main      #96       +/-   ##
===========================================
+ Coverage   49.10%   66.86%   +17.75%     
===========================================
  Files           4        4               
  Lines         167      172        +5     
===========================================
+ Hits           82      115       +33     
+ Misses         85       57       -28     

see 3 files with indirect coverage changes

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