[INTCONTRIB-187] Added check for schema property to show/hide count in exposed filters select lists.

[elNico]

Motivation and Context

JIRA issue: https://salsadigital.atlassian.net/browse/INTCONTRIB-187

Matching BE PR:

https://github.com/dpc-sdp/content-vic-gov-au/pull/1323

Changed

1. Added a new schema property check to hide counts in filter select lists.
2. New property is elasticsearch-aggregation-show-count

In schema:
https://github.com/salsadigitalauorg/content-collection-component/blob/master/src/validation/schema.json#L298
https://github.com/salsadigitalauorg/content-collection-component/blob/master/schema/schema.js#L544

Can be seen here:
https://salsadigitalauorg.github.io/content-collection-component/#/

Screenshots

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Improvement/refactoring (non-breaking change that doesn't add any features but makes things better)

Checklist

• I've added relevant changes to the documentation.
• I have added tests to cover my changes (if not applicable, please state why)
• My change requires a template update for create-ripple-app.
• I have added template update script for next release.

[dylankelly]

this has been merged as part of #1203 and released in #1211