migrate imports from localstack_ext to localstack.pro.core #134

Job	Run time
build (macos-12, darwin, amd64)	2m 1s
build (macos-12, darwin, amd64)	1m 31s
build (macos-13-xlarge, darwin, arm64)	4m 54s
build (macos-13-xlarge, darwin, arm64)	49s
build (windows-2019, windows, amd64)	12m 57s
build (windows-2019, windows, amd64)	12m 24s
build (ubuntu-20.04, linux, amd64)	1m 0s
build (ubuntu-20.04, linux, amd64)	52s
build (buildjet-2vcpu-ubuntu-2204-arm, linux, arm64)	4m 25s
build (buildjet-2vcpu-ubuntu-2204-arm, linux, arm64)	3m 55s
release	0s
release	0s
	44m 48s

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