TT-10891 Remove TYK_GW_POLICIES_RECORD_NAME

[djablonski-moia]

With this value set, policies can't be created via the API, nor are others used when added as files. According to this community support request / answer, this configuration option is legacy anyway for a long time already.

Description

Removed the (legacy) TYK_GW_POLICIES_RECORD_NAME env variable for configurations without remoteControlPlane enabled (haven't tested in such an environment, therefore not changing it there).

Related Issue

Motivation and Context

We had the problem that policies were not found/created, and searching brought up this community request/response, and removing the env variable immediately fixed the issue.

Test Coverage For This Change

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Refactoring or add test (improvements in base code or adds test coverage to functionality)
• Documentation updates or improvements.

Checklist

• Make sure you are requesting to pull a topic/feature/bugfix branch (right side). If PRing from your fork, don't come from your master!
• Make sure you are making a pull request against our master branch (left side). Also, it would be best if you started your change off our latest master.
• My change requires a change to the documentation.
  • I have manually updated the README(s)/documentation accordingly.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[djablonski-moia]

I'm unsure about the tests mentioned in the PR template, haven't seen any for the charts 🤔