Ray Cluster Plugin

[pingsutw]

TL;DR

• Add ray plugin to create RayCluster custom resource
• Upgrade the kubeflow operator since the version of sigs.k8s.io/controller-runtime in Kuberay is incompatible with the one in tf-operator/pytorch-operator
• Add a new phase PhaseClusterRunning.

Type

• Bug Fix
• Feature
• Plugin

Are all requirements met?

• Code completed
• Smoke tested
• Unit tests added
• Code documentation added
• Any pending items have an associated Issue

Complete description

How did you fix the bug, make the feature etc. Link to any design docs etc

Tracking Issue

flyteorg/flyte#2641

Follow-up issue

NA

[codecov]

Codecov Report

Merging #277 (782e2a1) into master (902b902) will increase coverage by 0.33%.
The diff coverage is 77.30%.

❗ Current head 782e2a1 differs from pull request most recent head d5bd00f. Consider uploading reports for the commit d5bd00f to get more accurate results

@@            Coverage Diff             @@
##           master     #277      +/-   ##
==========================================
+ Coverage   62.97%   63.31%   +0.33%     
==========================================
  Files         142      143       +1     
  Lines        8970     9194     +224     
==========================================
+ Hits         5649     5821     +172     
- Misses       2799     2845      +46     
- Partials      522      528       +6     

Flag	Coverage Δ
unittests	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
go/tasks/pluginmachinery/core/phase.go	23.45% <0.00%> (-0.60%)	⬇️
go/tasks/pluginmachinery/core/phase_enumer.go	13.33% <ø> (ø)
go/tasks/plugins/k8s/kfoperators/mpi/mpi.go	74.44% <73.33%> (ø)
...o/tasks/plugins/k8s/kfoperators/pytorch/pytorch.go	71.62% <73.33%> (-0.38%)	⬇️
go/tasks/plugins/cluster_resource/ray/ray.go	77.67% <77.67%> (ø)
...s/plugins/k8s/kfoperators/tensorflow/tensorflow.go	75.86% <77.77%> (-0.28%)	⬇️
...machinery/flytek8s/config/k8spluginconfig_flags.go	50.00% <100.00%> (ø)
.../plugins/k8s/kfoperators/common/common_operator.go	79.38% <100.00%> (ø)

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