feat: add big object index support

[scolladon]

What does this pull request contain?

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• Added (for new features).
• Changed (for changes in existing functionality).
• Deprecated (for soon-to-be removed features).
• Removed (for now removed features).
• Fixed (for any bug fixes).
• Security (for vulnerability fixes).

Explain your changes

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Add configuration to include Sub Custom Object Index metadata for big object

Does this close any currently open issues?

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closes #327

• Jest test added to check the fix is applied.

[codeclimate]

Code Climate has analyzed commit f207f73 and detected 0 issues on this pull request.

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[codecov]

Codecov Report

Merging #330 (f207f73) into main (5e2cb9a) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main      #330   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           23        23           
  Lines          633       633           
=========================================
  Hits           633       633           

Impacted Files	Coverage Δ
src/service/typeHandlerFactory.js	100.00% <ø> (ø)
src/utils/metadataConstants.js	100.00% <ø> (ø)

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[mehdicherf]

LGTM