Add m7a EC2 instance types (#2965) #511

Job	Run time
Run test of provider shim	1m 14s
prerequisites	19m 54s
License Check / License Check	3m 42s
generate_coverage_data	15m 8s
build_sdk (nodejs)	6m 29s
build_sdk (python)	6m 12s
build_sdk (dotnet)	6m 30s
build_sdk (go)	6m 51s
build_sdk (java)	6m 11s
test (nodejs)	29m 35s
test (python)	16m 56s
test (dotnet)	14m 51s
test (go)	31m 49s
test (java)	15m 20s
publish	0s
publish_sdk	0s
Tag release if labeled as needs-release	0s
	3h 0m 42s

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