Add support for arrays of multi-valued fields in pipeline properties

[marthacryan]

Added to address issues in elyra-ai/elyra#2927.

Developer's Certificate of Origin 1.1

   By making a contribution to this project, I certify that:

   (a) The contribution was created in whole or in part by me and I
       have the right to submit it under the Apache License 2.0; or

   (b) The contribution is based upon previous work that, to the best
       of my knowledge, is covered under an appropriate open source
       license and I have the right under that license to submit that
       work with modifications, whether created in whole or in part
       by me, under the same open source license (unless I am
       permitted to submit under a different license), as indicated
       in the file; or

   (c) The contribution was provided directly to me by some other
       person who certified (a), (b) or (c) and I have not modified
       it.

   (d) I understand and agree that this project and the contribution
       are public and that a record of the contribution (including all
       personal information I submit with it, including my sign-off) is
       maintained indefinitely and may be redistributed consistent with
       this project or the open source license(s) involved.

[codecov-commenter]

Codecov Report

Merging #201 (8977a75) into main (b9021eb) will decrease coverage by 1.31%.
The diff coverage is 15.51%.

@@            Coverage Diff             @@
##             main     #201      +/-   ##
==========================================
- Coverage   62.85%   61.53%   -1.32%     
==========================================
  Files          46       46              
  Lines        1642     1682      +40     
  Branches      471      483      +12     
==========================================
+ Hits         1032     1035       +3     
- Misses        484      516      +32     
- Partials      126      131       +5     

Impacted Files	Coverage Δ
...es/pipeline-editor/src/PipelineController/index.ts	57.94% <4.54%> (-2.45%)	⬇️
...pipeline-services/src/migration/migrateV8/index.ts	46.87% <11.76%> (-41.37%)	⬇️
...line-editor/src/CustomFormControls/CustomArray.tsx	33.33% <23.52%> (-8.34%)	⬇️
packages/pipeline-editor/src/NodeTooltip/utils.ts	100.00% <100.00%> (ø)
packages/pipeline-services/src/migration/index.ts	100.00% <100.00%> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[ajbozarth]

I've added the migration update, but I still need to update the tests to include the new migration case