Remove unused pytest markers

[sfc-gh-stan]

1. Which Jira issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

   Fixes SNOW-NNNNNNN

2. Fill out the following pre-review checklist:

   • I am adding a new automated test(s) to verify correctness of my new code
     • If this test skips Local Testing mode, I'm requesting review from @snowflakedb/local-testing
   • I am adding new logging messages
   • I am adding a new telemetry message
   • I am adding new credentials
   • I am adding a new dependency
   • If this is a new feature/behavior, I'm adding the Local Testing parity changes.

3. Please describe how your code solves the related issue.

   This is a test config only changes. I'm removing all pytest.mark.localtest because we run Local Testing against all tests now. In addition, I removed a few typos like pytest.mark.local and pytest.mark.locatest. I also removed scala from tox.ini because there are no tests marked with pytest.mark.scala, this dangling marker generates a pytest warning.