[Documentation] Onboard Budget Policy to TAG Documentation

[tanmay-db]

Changes

Tests

• make test run locally
• relevant change in docs/ folder
• covered with integration tests in internal/acceptance
• using Go SDK
• using TF Plugin Framework

[github-actions]

Please ensure that the NEXT_CHANGELOG.md file is updated with any relevant changes.
If this is not necessary for your PR, please include the following in your PR description:
NO_CHANGELOG=true
and rerun the job.

[github-actions]

If integration tests don't run automatically, an authorized user can run them manually by following the instructions below:

Trigger:
go/deco-tests-run/terraform

Inputs:

• PR number: 4677
• Commit SHA: cc6bb9f3b80bea5c07cbc9c0576ef9180b0e1be7

Checks will be approved automatically on success.