feat: Support date to timestamp cast

[coderfender]

Which issue does this PR close?

Adds cast support from date to timestamp

Closes #3400

Rationale for this change

What changes are included in this PR?

How are these changes tested?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 60.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.02%. Comparing base (f09f8af) to head (4c6eb3a).
⚠️ Report is 923 commits behind head on main.

Files with missing lines	Patch %	Lines
...scala/org/apache/comet/expressions/CometCast.scala	60.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3383      +/-   ##
============================================
+ Coverage     56.12%   60.02%   +3.89%     
- Complexity      976     1475     +499     
============================================
  Files           119      175      +56     
  Lines         11743    16184    +4441     
  Branches       2251     2688     +437     
============================================
+ Hits           6591     9714    +3123     
- Misses         4012     5114    +1102     
- Partials       1140     1356     +216     

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[coderfender]

@parthchandra , @andygrove . Please take a look whenever you get a chance .

[coderfender]

I believe I can piggy back Date -> numeric types (which always return null) in thr PR or perhaps in a different PR if you think that is a good idea ? (Date -> Int is more a formality than adding additional logic)

[andygrove]

LGTM, pending CI. Thanks @coderfender

[coderfender]

Thank you for the quick approval @andygrove . Given that CI has passed , please merge the branch whenever you get a chance . Thank you