Update Helm release pxc-operator to v1.15.1

This MR contains the following updates:

Package	Type	Update	Change
pxc-operator (source)	HelmChart	patch	1.15.0 -> 1.15.1

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Release Notes

percona/percona-helm-charts (pxc-operator)

v1.15.1

Compare Source

A Helm chart for deploying the Percona Operator for MySQL (based on Percona XtraDB Cluster)

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Configuration

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