Replace angle brackets in translations with entity codes

What does this MR do?

Part of: #228846 (closed)

Replace angle brackets (<, >) in translated backend strings with their HTML entity code (<, >).

This is a follow up to https://gitlab.com/gitlab-org/gitlab/-/issues/217933 where we disallowed HTML in translations and moved all existing linter errors to a todolist.

Screenshots

Group New error message:

Integrations Notice:

Two Factor Auth Registrations:

Pages Access:

Slack Integration:

Personal Access Tokens: Can't get into this state due to database constraint.

Deploy Tokens:

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done