Add the originating element in LazyMapKeyProxyGenerator. #4965

Job	Run time
Validate Dagger version	10s
Bazel tests	16m 18s
Bazel build	4m 12s
Test Hilt Gradle plugin	8m 14s
Artifact verification tests	14m 59s
Artifact Android local tests (AGP 8.1.1)	9m 39s
Artifact Android emulator tests (API ${{ matrix.api-level }})	0s
Artifact Java local tests	3m 50s
Build Hilt Gradle plugin against latest AGP version	0s
Clean up GitHub Action caches	5s
Publish snapshot	0s
	57m 27s

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