replaces parameterized_sin with parameterized_sincos

Miha Muskinjarequested to merge
mmuskinj/athena:21.0-parameterized_sincos into 21.0

Parameterized_sin calculated cosine as sqrt(1-cos^2). Parameterized_sincos calculates it in the same parameterized way as sine and offers about a 1% speedup of the total simulation time.

This change has been put through physics validation and recently approved: ATLPHYSVAL-601

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