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[Non BE][Renderer Non BE] Reduce MAX_ANGULAR_STEP in TD renderer filter interpolation. Fix observed clicks in IVAS_rend

norvellrequested to merge
421-clicks-in-ivas_rend-td-renderer-observed-in-nokia-ism3-test into main

Related to #421 (closed)

There were clicks observed in Nokia's ISM3 tests, originating from the IVAS_rend where the TD renderer is used. There is an interpolation that handles the transition between filters, depending on the size of the step in azimuth and elevation. However, it seems that also smaller steps may introduce clicks in the transition. This is a small fix, setting the smallest stepsize to a very low value, meaning that the interpolation would be active practically for all changing metadata angles.

@ramoa, could you check that this solves the observed clicks in IVAS_rend? When processing the samples you shared with us using the IVAS codec, I could also hear some clicks originating from the coding. Of course, they would not be there when rendering the direct source signal.

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