[stable/percona-xtradb-cluster] Minor version bump: Fix chart not being upgradable

[mr-yaky]

What this PR does / why we need it:

Major version bump: Fix chart not being upgradable by removing 'chart' label from spec.selector or spec.VolumeClaimTemplate.

Special notes for your reviewer:

See #7680 and #7803 for explanations

[k8s-ci-robot]

Hi @mr-yaky. Thanks for your PR.

I'm waiting for a helm 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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[mr-yaky]

/assign @paulczar

[paulczar]

/ok-to-test
/lgtm

[paulczar]

you'll need to sign your commit for DCO!

[mr-yaky]

sorry, for the delay

you'll need to sign your commit for DCO!

done

[paulczar]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mr-yaky, paulczar

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