Don't exclude default product test config on non-fork PRs

[nineinchnick]

Description

We noticed that in #13183 the suite-delta-lake-databricks job didn't run and it's because PRs without tests:* labels exclude the default config. This allows this config to be used in PRs created by maintainers in the trino repository, not in forks. It'll run even more product tests, but such PRs are mostly used to test some changes with all secrets, that is the most possible coverage.

Is this change a fix, improvement, new feature, refactoring, or other?
improvement

Is this a change to the core query engine, a connector, client library, or the SPI interfaces? (be specific)
CI product tests

How would you describe this change to a non-technical end user or system administrator?
n/a

Related issues, pull requests, and links

Documentation

(x) No documentation is needed.
( ) Sufficient documentation is included in this PR.
( ) Documentation PR is available with #prnumber.
( ) Documentation issue #issuenumber is filed, and can be handled later.

Release notes

(x) No release notes entries required.
( ) Release notes entries required with the following suggested text:

# Section
* Fix some things. ({issue}`issuenumber`)

[ebyhr]

Merged, thanks!