Implemented grid_sample function:

[JustinValentin954]

• Support for nearest neighbor sampling added.
• Modes include 'nearest' with padding options 'zeros' and 'border'.
• 'bilinear' mode marked as not implemented for future work.

Close #21957.

[github-actions]

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[ivy-leaves]

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[KevinUnadkat]

hy @JustinValentin954
can pls add link the issue to the pr

[ivy-seed]

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[ivy-seed]

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