* shader: add S_BITCMP0_B64 and S_BITCMP1_B64
* test: move S_BITCMP_B64 coverage to compute suite
* test: use the existing compute CTest entry for bit comparisons
* test: remove the dedicated S_BITCMP_B64 command-line selector
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Co-authored-by: nmzik <Nmzik@mail.ru>
* shader: implement S_ASHR_I64 with compute coverage
* tests: use existing compute suite for S_ASHR_I64
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Co-authored-by: nmzik <Nmzik@mail.ru>