Change the default memory size to 30GB for make examples
Change the default memory size to 30GB for make examples

It was 32GB previously, which would have resulted in the v1 pipelines API
allocating a n1-highmem-8 instead of an n1-standard-8 for the make examples
workers.

PiperOrigin-RevId: 190767781

google/deepvariant,google/deepvariant,google/deepvariant