Add priority class to the innodb cluster

[ram-vibhul]

Because of the eviction policy from k8s, lower priority pods are getting evicted and in our case, the innodb cluster pods got evicted and finalizer prevented it from completing graceful shutdown and it hangs.
So added priority class on helm for the innodb cluster pod to ensure they have a higher priority compared to other pods in the cluster.

[mysql-oca-bot]

Hi, thank you for submitting this pull request. In order to consider your code we need you to sign the Oracle Contribution Agreement (OCA). Please review the details and follow the instructions at https://oca.opensource.oracle.com/
Please make sure to include your MySQL bug system user (email) in the returned form.
Thanks

[ram-vibhul]

Hi, thank you for submitting this pull request. In order to consider your code we need you to sign the Oracle Contribution Agreement (OCA). Please review the details and follow the instructions at https://oca.opensource.oracle.com/ Please make sure to include your MySQL bug system user (email) in the returned form. Thanks

I confirm the code being submitted is offered under the terms of the OCA, and that I am authorized to contribute it.

[mysql-admin]

Hi @ram-vibhul,
I can't find a record of your signed OCA. Please send me details in email (omer.barnir@oracle.com)

Thanks for contributing to MySQL
==Omer

[ram-vibhul]

Hi @ram-vibhul, I can't find a record of your signed OCA. Please send me details in email (omer.barnir@oracle.com)

Thanks for contributing to MySQL ==Omer

Hi Omer. Thanks for response. I have sent it in mail

[mysql-oca-bot]

Hi, thank you for your contribution. Your code has been assigned to an internal queue. Please follow
bug http://bugs.mysql.com/bug.php?id=114672 for updates.
Thanks