feat(cc_import): add `src` attribute #709

Job	Run time
Commit checks (1.18, ubuntu-latest, 3.x)	27s
Go 1.18 tests ubuntu-latest	41s
Go 1.20 tests ubuntu-latest	28s
Test ubuntu-latest, Go 1.20, Python 3.x	1m 58s
Go 1.19 tests ubuntu-latest	25s
Test ubuntu-latest, Go 1.19, Python 3.x	1m 47s
Go 1.20 tests macos-latest	32s
Go 1.18 tests macos-13	1d 0h 0m 0s
Bazel 8.0.0 ubuntu-latest	1m 53s
Python 3.8 tests ubuntu-latest	16s
Test ubuntu-latest, Go 1.18, Python 3.x	1m 50s
Python 3.8 tests macos-13	1d 0h 0m 0s
pre-commit	43s
Python 3.10 tests macos-latest	39s
Python 3.10 tests ubuntu-latest	15s
Python 3.9 tests ubuntu-latest	19s
Bazel Coverage	3m 49s
	2d 0h 16m 2s

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