SNOW-543851: introduce skip label

[sfc-gh-aling]

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

   Fixes SNOW-543851

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.
   • I acknowledge that I have ensured my changes to be thread-safe. Follow the link for more information: Thread-safe Developer Guidelines
   • If adding any arguments to public Snowpark APIs or creating new public Snowpark APIs, I acknowledge that I have ensured my changes include AST support. Follow the link for more information: AST Support Guidelines

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

introduce 4 skip labels to allow skipping tests

• skip-local-testing-ci: skip local test running
• skip-ast-encoding-ci: skip ast related tests running
• skip-snowpark-pandas-ci: skip modin related tests running
• skip-snowpark-python-ci: skip python api related tests running

runnings are triggered by label edit/ pr/ commit

[sfc-gh-jrose]

This seems like a lot of boilerplate added to each of the test steps. You could skip it at the top level by doing something similar to the local testing check:

snowpark-python/.github/workflows/enforce_localtest.yml

Line 11 in ae8c0b5

if: ${{!contains(toJSON(github.event.pull_request.requested_teams), 'local-testing')}}

That doesn't let you have as nice of a message though.

[sfc-gh-aling]

@sfc-gh-jrose skip the test is not enough.. there are required merge gates, and skipping tests can't pass required merge gate, let me check if there are other ways to simplify the code change

[sfc-gh-aling]

only run required tests
can opt in to run all tests