test-data: restrict large yuv to perf tests
test-data: restrict large yuv to perf tests

niklas_1280_720_30.yuv (~619M) is only required with
--enable-decoder-perf-tests

Change-Id: I143f7e83215b4b7214cf45b752c94a9ee05093d4

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom