Update python Docker tag to v3.12.1 #1491

Job	Run time
provide-agp-version-matrix	2s
icons-test (28)	23m 23s
build	3m 11s
Configuration Cache Java-17 OS-ubuntu-latest	3m 53s
Configuration Cache Java-17 OS-windows-latest	6m 12s
Configuration Cache Java-17 OS-macos-latest	5m 13s
Configuration Cache Java-20 OS-ubuntu-latest	3m 44s
Configuration Cache Java-20 OS-windows-latest	5m 27s
Configuration Cache Java-20 OS-macos-latest	3m 58s
Run Gradle-release-candidate, AGP-8.2.0, Java-17	6m 23s
Run Gradle-release-candidate, AGP-8.2.0-beta06, Java-17	7m 0s
Run Gradle-release-candidate, AGP-8.3.0-alpha17, Java-17	6m 26s
Run Gradle-release-candidate, AGP-8.2.0, Java-20	5m 58s
Run Gradle-release-candidate, AGP-8.2.0-beta06, Java-20	6m 14s
Run Gradle-release-candidate, AGP-8.3.0-alpha17, Java-20	6m 6s
Run Gradle-8.0, AGP-8.0.0, Java-17	6m 48s
Run Gradle-current, AGP-8.0.0, Java-17	6m 9s
Run Gradle-current, AGP-8.0.0, Java-19	5m 58s
	1h 52m 5s

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