🌱Refactor makefile e2e commands.

[xuezhaojun]

Summary

Except for the standard e2e prepare process: test-e2e.

We may also want to customized the process, for example:

# deploy ocm hub on hub1
make deploy-hub KUBECONFIG=/home/runner/.kube/hub1 HUB_KUBECONFIG=/home/runner/.kube/hub1-kubeconfig

# deploy ocm hub on hub2
make deploy-hub KUBECONFIG=/home/runner/.kube/hub2 HUB_KUBECONFIG=/home/runner/.kube/hub2-kubeconfig

# deploy ocm agent on spoke
make deploy-spoke-operator KUBECONFIG=/home/runner/.kube/spoke

run-e2e

The changes intend to make deploy-hub and run-e2e commands more independent, so we can reuse them in different e2e prepare processes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.12%. Comparing base (565af66) to head (7bc2727).
Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #534   +/-   ##
=======================================
  Coverage   62.11%   62.12%           
=======================================
  Files         141      141           
  Lines       11744    11747    +3     
=======================================
+ Hits         7295     7298    +3     
  Misses       3677     3677           
  Partials      772      772           

Flag	Coverage Δ
unit	62.12% <ø> (+<0.01%)	⬆️

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[xuezhaojun]

/assign @qiujian16

[qiujian16]

/approve
/lgtm

[openshift-ci]

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