fix(16991): fix keyboard navigation's focus lock issue in DatePicker

[2nikhiltom]

Closes #16991

This PR fixes keyboard navigation issue with DatePicker: Now focus moves out of datePicker to the next focusable element in the DOM on Tab key press

Changelog

Adds to useEffect to remove the focus from calendar on Tab key

It checks if the pressed key is 'Tab' (without Shift) and if the endInputField is focused and that the calendar is open
If the condition matches : It close the calendar and remove focus from the endInputField

Testing / Reviewing

Select the dates using keyboard after selection of end date press tab and verify that the focus moves to the next focusable element in the DOM

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[guidari]

LGTM! 🚀

[carbon-automation]

Hey there! v11.64.0 was just released that references this issue/PR.