Add storage override for PostgreSQL PVC Request

[jinhong-]

What

Enables customization of storage size when using integrated PostgreSQL as 1GB is not sufficient in heavier usages

How

Describe the solution Add value postgresql.storage.volumeClaimValue (default 500Mi).

Recommended reading order

1. airbyte-platform/charts/airbyte/README.md

Can this PR be safely reverted / rolled back?

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Otherwise if your PR has a breaking change, like a database migration for example, check the NO box.

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• [ ] YES 💚
• [ ] NO ❌

🚨 User Impact 🚨

No breaking changes

[pai911]

Hi! just needed this configuration!

Any reason why this is not proceeded?

[CLAassistant]

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