feat: support mt on plugin page

[mhrabovcin]

What type of PR is this?

Adds MT support on credentials plugin page.

What this PR does/ why we need it:

Which issue(s) this PR fixes:

https://d2iq.atlassian.net/browse/D2IQ-98909

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Checklist

• If a chart is changed, the chart version is correctly incremented.
• The commit message explains the changes and why are needed.
• The code builds and passes lint/style checks locally.
• The relevant subset of integration tests pass locally.
• The core changes are covered by tests.
• The documentation is updated where needed.

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