DG-1988 Minor improvements on append/remove/replace for Tags

[hr2904]

Change description

Removing UpdateClassification array. AppendClassification (being renamed to addOrUpdate) will be responsible for add/update based on classification state in atlas. Incase classification doesnt exist , add flow will be used, otherwise any change or no change in config in a pre-existing classification will be treated for update flow.
For Remove Classification Flow, not going to throw any error, instead will be silently logging it in case the classification in the array doesnt exist with Atlas.

Type of change

• New feature (adds functionality)

Related issues

Fix #1
Testcases
Thread

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