Add GRPC Buffer Size to the Configmap

[StuxxNet]

What this PR does / why we need it:

It enables the user to set the GRPC Buffer Size via the configmap in Kilobytes.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• CVE Report (Scanner found CVE and adding report)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation only

Which issue/s this PR fixes

fixes #9374

How Has This Been Tested?

It was tested in the e2e testing suite, and also checked locally in the kind cluster that is started during the tests executions to verify if the parameter was in place.

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added unit and/or e2e tests to cover my changes.
• All new and existing tests passed.

[k8s-ci-robot]

Hi @StuxxNet. Thanks for your PR.

I'm waiting for a kubernetes 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.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[netlify]

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[knabben]

/ok-to-test

[rikatz]

/label tide/merge-method-squash
/triage accepted

[rikatz]

/kind feature

[rikatz]

/cc
/assign
/priority backlog

[rikatz]

/lgtm
/approve

Thank you!!

[knabben]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: knabben, rikatz, StuxxNet

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files:

• OWNERS [rikatz]

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