Feat: Support array_join function

[erenavsarogullari]

Which issue does this PR close?

Related to Epic: #1042
array_join: select array_join(array('hello', '-', 'world'), ' ') => hello - world
DataFusion' s array_join function is alias of array_to_string function:
https://datafusion.apache.org/user-guide/sql/scalar_functions.html#array-join

Rationale for this change

Defined under Epic: #1042

What changes are included in this PR?

planner.rs: Created DataFusion array_join physical expression from Spark physical expression with return type: DataType::Utf8,
expr.proto: array_join message has been added (array_intersect is 62),
QueryPlanSerde.scala: array_join pattern matching case has been added,
CometExpressionSuite.scala: A new UT has been added for array_join function.

How are these changes tested?

A new UT has been added and first query result is as follows:

[SteNicholas]

Why not use 62?

[erenavsarogullari]

I have another PR for array_intersect and it uses 62. I think array_intersect can go first.

[NoeB]

I think the handling of the third argument (nullReplacement) is missing see: https://docs.databricks.com/en/sql/language-manual/functions/array_join.html#arguments. I think this will also require a new expression type in expr.proto

[erenavsarogullari]

I think the handling of the third argument (nullReplacement) is missing see: https://docs.databricks.com/en/sql/language-manual/functions/array_join.html#arguments. I think this will also require a new expression type in expr.proto

Thanks - That is right both Spark and DataFusion support optional nullReplacement and this requires new ArrayJoin Proto message.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 86.20690% with 4 lines in your changes missing coverage. Please review.

Project coverage is 34.71%. Comparing base (be48839) to head (895e701).
Report is 17 commits behind head on main.

Files with missing lines	Patch %	Lines
.../scala/org/apache/comet/serde/QueryPlanSerde.scala	86.20%	0 Missing and 4 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1290      +/-   ##
============================================
+ Coverage     34.69%   34.71%   +0.01%     
- Complexity      991      992       +1     
============================================
  Files           116      117       +1     
  Lines         44891    45148     +257     
  Branches       9864     9956      +92     
============================================
+ Hits          15574    15671      +97     
- Misses        26168    26310     +142     
- Partials       3149     3167      +18     

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[jatin510]

lgtm 👍

[andygrove]

@erenavsarogullari could you fix the conflicts on this PR?

[erenavsarogullari]

Thanks @andygrove. Sure, i will have a look in today.