ADMIN-358 | Fix not_in operator tags in abac

[krsoninikhil]

Change description

ES query for NOT_IN operator is incorrect as it attaches should clause directly to a must_not. Also, NOT_EQUALS and NOT_IN operators are exactly same so they can be combined.

Test cases:

• Created policy with NOT_IN operator for tags
• Created policy with NOT_EQUALS operator for tags and verified the access.

Type of change

• Bug fix (fixes an issue)
• New feature (adds functionality)

Related issues

Fix #1

Helm Config Changes for Running Tests (Staging PR)

Does this PR require Helm config changes for testing?

• Tests are NOT required for this commit. (You can proceed with the PR.) ✅
• No, Helm config changes are not needed. (You can proceed with the PR.) ✅
• Yes, I have already updated the config-values on enpla9up36. (You can proceed with the PR.) ✅
• Yes, but I have NOT updated the config-values. (Please update them before proceeding; or, tests will run with default values.)⚠️

Checklists

Development

• Lint rules pass locally
• Application changes have been tested thoroughly
• Automated tests covering modified code pass

Security

• Security impact of change has been considered
• Code follows company security practices and guidelines

Code review

• Pull request has a descriptive title and context useful to a reviewer. Screenshots or screencasts are attached as necessary
• "Ready for review" label attached and reviewers assigned
• Changes have been reviewed by at least one other contributor
• Pull request linked to task tracker where applicable