Fix mem band cache enable in dmvr

Ryoji HASHIMOTOrequested to merge
hashimry/VVCSoftware_VTM:Fix_mem_band_cache_enable_in_dmvr into master

Fix memory bandwidth of DMVR again. Cache is enabled incorrectly in DMVR process. Checking srcPadStride enables cache because srcPadStride is always 0 other than DMVR process

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