Additional gatekeeper policies

[iamahgoub]

What does this PR do?

Add two gatekeeper polices - one for restricting AWS regions that resources can be provisioned into, and the other is for preventing provisioning resources without the required tags.

Motivation

Use the two new policies for creating labs on using Gatekeeper with Crossplane.

More

• [ X] Yes, I have tested the PR using my local account setup (Provide any test evidence report under Additional Notes)

• [ ] Yes, I have added a new example under examples to support my PR

• [ ] Yes, I have updated the docs for this feature

• [ ] Yes, I have linked to an issue or feature request (applicable to PRs that solves a bug or a feature request)

Note:

• Not all the PRs require examples and docs
• We prefer small, well tested pull requests. Please ensure your pull requests are self-contained, and commits are squashed

For Moderators

• [ ] E2E Test successfully complete before merge?

Additional Notes