SNOW-802269 - Add missing scala and java functions

[sfc-gh-gmahadevan]

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

   Fixes #SNOW-802269

2. Fill out the following pre-review checklist:

   • [X] I am adding a new automated test(s) to verify correctness of my new code
   • [ ] I am adding new logging messages
   • [ ] I am adding a new telemetry message
   • [ ] I am adding new credentials
   • [ ] I am adding a new dependency

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

   Add below missing functions in scala and java modules

API	Description
functions.expr	alias for sqlExpr
functions.array	alias for array_construct
functions.date_format	alias for to_varchar
functions.last	LAST_VALUE

Pre-review checklist

(For Snowflake employees)

• [X] This change has passed precommit
• [ ] I have reviewed code coverage report for my PR in (Sonarqube)