Add CEL rules test suite

[leonardoce]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:

This patch adds several YAML test cases that check if the CEL rules included in the CRDs are correctly working. Both validation rules and transition rules are checked.

A shell script is provided to execute these tests.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

Hi @leonardoce. Thanks for your PR.

I'm waiting for a kubernetes-csi member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[leonardoce]

I'm not 100% sure which directory to add these test cases to. Any feedback is greatly appreciated.
cc: @xing-yang

[xing-yang]

/ok-to-test

[xing-yang]

We've bumped the K8s deps to 1.30. Can you change to >=1.30?

[leonardoce]

I rebased it and tested it against the new master, and everything is still green. Thanks @xing-yang!

[xing-yang]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: leonardoce, xing-yang

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