Background scan to remove unnecessary timers

Is your feature request related to a problem? Please describe.
There are many situations where tasks in Temporal are protected by timeout tasks. Most of the time these timers end up being redundant when workflows/tasks complete successfully.
Further user can create user timers in the future and never need them because workflow completes well before them.

Describe the solution you'd like
I'm proposing a background job which scans all timer queues and delete any tasks for expired workflows/tasks.
One thing to consider is that we use range deletes when cleaning up timer queues and moving cursor. This may need not be an option to remove tasks individually.

Describe alternatives you've considered

Additional context

Start by tracing the timer queues and the existing cleanup path, especially how range deletes and cursor movement work. The work is done when a background job scans timer queues and removes tasks belonging to expired workflows or tasks without breaking existing cleanup behavior.