Add delimiter for list of values

[sayuree]

Description

[Added delimiter for values in Add filter]

Issues Resolved

partially opensearch-project/oui#661

Check List

• All tests pass
  • yarn test:jest
  • yarn test:jest_integration
  • yarn test:ftr
• New functionality includes testing.
• New functionality has been documented.
• Update CHANGELOG.md
• Commits are signed per the DCO using --signoff

[codecov-commenter]

Codecov Report

Merging #3686 (9232833) into main (44e2e34) will increase coverage by 0.04%.
The diff coverage is n/a.

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@@            Coverage Diff             @@
##             main    #3686      +/-   ##
==========================================
+ Coverage   66.38%   66.43%   +0.04%     
==========================================
  Files        3210     3210              
  Lines       61676    61676              
  Branches     9522     9522              
==========================================
+ Hits        40942    40972      +30     
+ Misses      18448    18422      -26     
+ Partials     2286     2282       -4     

Flag	Coverage Δ
Linux	66.37% <ø> (?)
Windows	66.38% <ø> (ø)

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see 5 files with indirect coverage changes

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[joshuarrrr]

@sayuree For this PR, it would be helpful to add a screencast or multiple screenshots of what it's like to use the new field to add multiple filters.

[joshuarrrr]

This is not a complete fix for the issue (see opensearch-project/oui#661). But it is a step in the right direction.

[joshuarrrr]

@sayuree All tests pass, and the change looks good. Just a couple small changes requested for the CHANGELOG, then we can approve.

[joshuarrrr]

All tests passed