Merge tee-worker to parachain

[Kailai-Wang]

Context

After internal discussion we'd like to merge the tee-worker repo to this repo to make it a mono-repo.

Advantages are:

• easier commit sync and PR review
• manage issues/PRs in one place
• better version control
• simplified release process

The merge needs to be done at tee-dev branch first, and CI needs to be adjusted to cover different cases.
This needs to be done ASAP as it's the base for the subsequent development

---

✔️ Please set appropriate labels and assignees if applicable.

[Kailai-Wang]

Closed via #987