Draft: Add tracking to multi-select in boards

What does this MR do?

Related to #33726

Tracks event when moving multiple issues in boards.

Action	Event	Payload
Moving multiple issues to the same list	multiple_issues_moved	empty
Moving multiple issues to another list	multiple_issues_moved	empty

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