enable overriding the dataproc project for python models #21404

Job	Run time
build packages	13s
code-quality	1m 4s
unit test / python 3.9	1m 16s
unit test / python 3.10	1m 15s
unit test / python 3.11	1m 10s
unit test / python 3.12	1m 13s
verify packages / python 3.9 / ubuntu-latest / whl	31s
verify packages / python 3.9 / ubuntu-latest / gz	32s
verify packages / python 3.10 / ubuntu-latest / whl	31s
verify packages / python 3.10 / ubuntu-latest / gz	32s
verify packages / python 3.11 / ubuntu-latest / whl	35s
verify packages / python 3.11 / ubuntu-latest / gz	37s
verify packages / python 3.12 / ubuntu-latest / whl	42s
verify packages / python 3.12 / ubuntu-latest / gz	41s
verify packages / python 3.9 / macos-12 / whl	52s
verify packages / python 3.9 / macos-12 / gz	51s
verify packages / python 3.10 / macos-12 / whl	53s
verify packages / python 3.10 / macos-12 / gz	45s
verify packages / python 3.11 / macos-12 / whl	41s
verify packages / python 3.11 / macos-12 / gz	45s
verify packages / python 3.12 / macos-12 / whl	54s
verify packages / python 3.12 / macos-12 / gz	57s
verify packages / python 3.9 / windows-latest / whl	1m 17s
verify packages / python 3.9 / windows-latest / gz	2m 21s
verify packages / python 3.10 / windows-latest / whl	1m 13s
verify packages / python 3.10 / windows-latest / gz	2m 41s
verify packages / python 3.11 / windows-latest / whl	2m 0s
verify packages / python 3.11 / windows-latest / gz	1m 56s
verify packages / python 3.12 / windows-latest / whl	2m 1s
verify packages / python 3.12 / windows-latest / gz	2m 26s
	33m 25s

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