SNOW-2371712: Add support for geospatial functions (part 5)

[sfc-gh-aherreraaguilar]

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

   Fixes SNOW-2371712

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.

Adds support for scalar geospatial functions:

• st_aswkt
• st_azimuth
• st_buffer
• st_centroid
• st_collect
• st_contains
• st_coveredby
• st_covers
• st_difference
• st_dimension

[sfc-gh-mvegaalvarez]

code looks good, added minor comments, one regarding a missing test, and the others with the missed :: after the Examples text on several docstrings.