add eks m6&c6 instance types (#5146) #2

Job	Run time
test / lint	2m 13s
test / lint	2m 13s
test / unit-test	4m 3s
test / unit-test	4m 3s
build-tag-and-upload / build-and-upload	6m 33s
build-tag-and-upload / build-and-upload	6m 56s
	26m 1s

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