Updated projects settings in .asf.yaml (features, merge buttons, Jira autolinking)

[kpumuk]

This change will:

• Enable Jira autolinking for the THRIFT project (see commits in https://github.com/apache/zookeeper for example)
• Disable "merge" button, leaving only "Squash and merge" and "Rebase and merge". According to the contribution guide, merge commits are discouraged
• Disable Projects feature

See https://github.com/apache/infrastructure-asfyaml/blob/main/README.md for details

• Did you create an Apache Jira ticket? (Request account here, not required for trivial changes)
• If a ticket exists: Does your pull request title follow the pattern "THRIFT-NNNN: describe my issue"?
• Did you squash your changes to a single commit? (not required, but preferred)
• Did you do your best to avoid breaking changes? If one was needed, did you label the Jira ticket with "Breaking-Change"?
• If your change does not involve any code, include [skip ci] anywhere in the commit message to free up build resources.

[Jens-G]

Why do we want to forbid merge entirely?

[Jens-G]

According to the contribution guide, merge commits are discouraged

That document needs probably some maintenance. It derives from the practical implementation in certain aspects.