Fix and expand mergeable label mappings

[kpumuk]

This MR fixed Rust mapping (see #3344 (comment)), and also adds:

• Auto-tag tutorials/* - missed that one in the initial commit
• Supports two more tags - testsuite for general test suite related things, like certificates and test schema, and build and general CI that covers docker, makefiles (but no github actions, as that is a separate tag)

I think overall Mergeable worked beautifully over the past months.

• 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.