Maintenance windows: option to match tags with AND instead of OR

Maintenance window tag matching is currently OR only: any check with at least one of the window's tags is included. Combining tags like cluster:abc-prod and location:eu pauses every check that has either tag, instead of only the checks that have both.

Request: an option to require all selected tags to match (AND), similar to the existing AND operator for tag filtering on dashboards.

Use case: scoping maintenance windows to a specific cluster + location combination from a release pipeline. Today the only workaround is creating a dedicated combined tag per window (e.g. mw-abc-eu), which doesn't scale when tags already encode cluster, environment, and location separately.