SNOW-1888076: built-in function support wave1

[sfc-gh-aling]

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

   Fixes SNOW-1888076

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

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

• add new functions:
  • base64
  • base64_decode_string
  • base64_encode
  • editdistance
  • hex
  • hex_encode
  • instr
  • log1p
  • log2
  • log10
  • percentile_approx
  • unbase64
• enhanced:
  • map_cat/map_concat now supports columns more than 2

[sfc-gh-lspiegelberg]

lgtm!