fix: resolve memory leaks by detached elements and event listeners

[sahilrajthapa]

Describe your changes

Resolve memory leaks by removing event listeners on component unmount

• Remove touch and wheel event listeners in DpCalendar component
• Remove mousedown and pointerdown event listeners in DatepickerMenu component

Comparision of heap snapshots with this fix (left) and without this fix (right)

With passing :transitions="false"

This fix reduces retained size to 0%.

Without passing :transitions="false"

Even with the fix, there is still increase in retained size (as some elements are retained by transition). However, it still has less memory consumption compared to the situation without the fix.

Comparision of detached elements profile with this fix (left) and without this fix (right)

Issue ticket number and link

Fixes #1083

Checklist before requesting a review

• I have performed a self-review of my code
• I have ensured that unit tests pass without errors
• If it is a new feature, I have added a new unit test