[Repo]: Add stale issue and PR GH action

[swade1987]

Description

I want to add the https://github.com/actions/stale GitHub action to this repository due to the number of stale issues we still have and stale pull requests. It would be configured to do the following:

• Mark the issue as stale after 30 days of inactivity
• Close the issue after a further 30 days.
• Mark the pull request as stale after 30 days of inactivity
• Close the issue after a further 30 days.

We would also lock the issues and pull requests using https://github.com/dessant/lock-threads

Note: This does require a new label stale to be added to the list of options

References

Actions used:

• https://github.com/actions/stale
• https://github.com/dessant/lock-threads

Example usage (from upstream kubernetes terraform provider):

• https://github.com/hashicorp/terraform-provider-kubernetes/blob/main/.github/workflows/lock.yml
• https://github.com/hashicorp/terraform-provider-kubernetes/blob/main/.github/workflows/prune_stale_issues.yml

Would you like to implement a fix?

Yes