Abort signal is not handled by COG layer's getImage data fetch call

[dsuren1]

Description

This is an missing feature in geotiff.js where the abort signal is not passed down to data slice fetch call of getImage operation.

Currently in MS, as a workaround, the promise is cancelled but not the actual request which ensure that the user is not impacted by this issue in geotiff.js.

Once the geotiff.js is patched, we may need to check if Openlayer adopts this change, if not we may have to implement the fix in an isolated manner to ensure completeness in cancelling of geotiff layer's metadata fetch call

What kind of improvement you want to add? (check one with "x", remove the others)

• Minor changes to existing features
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

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