Improve pre-built provider generation by skipping code generation if provider version did not change

[ansgarm]

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Description

Pre-built providers are currently updated via a CRON job that pulls the latest (matching) Terraform provider and generates constructs for its schema. If there's a diff to the current state afterwards a PR is filed (that automerges). If nothing did change, the work is discarded. We should not do all this work (could be ~30mins for large providers) if the provider version did not change.

References

• https://github.com/hashicorp/cdktf-provider-project/blob/353c0e5a1490271f1cc21137471fae7f04c7c852/src/provider-upgrade.ts#L18
• https://github.com/hashicorp/cdktf-provider-null/blob/7caa047315f1f9a766df46d3c3ca7223f74f70ab/.github/workflows/provider-upgrade.yml#L6

[ansgarm]

This was implemented in cdktf/cdktf-provider-project#255

[github-actions]

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