[stable/goldilocks] Add pod priority class for goldilocks

[harshbhardwaj5]

Why This PR? a short description of why this PR is needed There is no pod priority class support available for goldilocks, so this change add pod priority class in goldilocks deployment Fixes #

Changes Changes proposed in this pull request:

• The addition of a pod priority class allows users to specify their own values based on their requirements, as there are no hardcoded defaults.

Checklist:

• [x] I have included the name of the chart in the title of this PR in square brackets i.e. [stable/goldilocks].
• [x] I have updated the chart version in Chart.yaml following Semantic Versioning.
• [x] Any new values are backwards compatible and/or have sensible default.
• [x] Any new values have been added to the README for the Chart, or helm-docs --sort-values-order=file has been run for the charts that support it.

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:white_check_mark: harshbhardwaj5
:x: Harsh Bhardwaj

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