update mcloud yamls + requirements for sd and sd-dreambooth #1941

Job	Run time
bert-pytest	3m 46s
resnet-cifar-pytest	1m 41s
deeplab-pytest	3m 6s
resnet-imagenet-pytest	2m 29s
stable-diffusion-pytest	3m 31s
stable-diffusion-dreambooth-pytest	1m 19s
	15m 52s

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