[O11y][CouchBase] Update visualization name and categories

[rajvi-patel-22]

Description

PR Link:

• [O11y][CouchBase] Update visualization name and categories #5893

Task 1

Fix title of Document Replicas [Metrics Couchbase] panel

After lens migration:

Expected Results:

Task 2

Update categories in manifest.yml. The changes made in #5123 PR are not reflacted in Lens migration PR #5612.

[rajvi-patel-22]

PR is approved and merged, hence closing this issue: #5893