[SEDONA-751] RS_Interpolate band index and noDataValue handling

[prantogg]

Did you read the Contributor Guide?

• Yes, I have read the Contributor Rules and Contributor Development Guide

Is this PR related to a ticket?

• Yes, and the PR name follows the format [SEDONA-XXX] my subject.

What changes were proposed in this PR?

Fixes two bugs in RS_Interpolate:

1. Band index bug: When interpolating a specific band in a multi-band raster, non-interpolated bands were copied using the wrong index variable (band instead of bandIndex), causing incorrect data in the output raster.

2. noDataValue NaN comparison bug: When noDataValue is NaN, the comparison interpolatedValue != noDataValue always returns true (since NaN != NaN in IEEE 754), causing countNoDataValues to be incorrectly decremented even when interpolation didn't produce a valid value. Fixed by using proper Double.isNaN() checks.

How was this patch tested?

Added testInterpolatePreservesOtherBands test that creates a 2-band raster, interpolates only band 1, and verifies band 2 is preserved unchanged. Existing interpolation tests continue to pass.

Did this PR include necessary documentation updates?

• No, this PR does not affect any public API so no need to change the documentation.