PICARD-2751: Avoid deprecated importlib APIs, full Python 3.12 compatibility #4076

Job	Run time
package-macos (10.12, 3.9.12-macosx10.9, 7888174c6fe441b00448c7ab3e9cbf0e6c3c7dea0750577baf09e138...	2m 18s
package-macos (10.14, 3.11.1-macos11, f4de33ad3ef09c3e31196b296aec761eabab4564fc8c25e50ea99edd019...	2m 27s
package-windows (store-app)	1m 40s
package-windows (signed-app)	1m 29s
package-windows (installer)	1m 49s
package-windows (portable)	1m 48s
package-pypi / pypi-bdist (macos-11, 3.7)	1m 3s
package-pypi / pypi-bdist (macos-11, 3.8)	1m 1s
package-pypi / pypi-bdist (macos-11, 3.9)	1m 3s
package-pypi / pypi-bdist (macos-11, 3.10)	1m 8s
package-pypi / pypi-bdist (macos-11, 3.11)	1m 7s
package-pypi / pypi-bdist (macos-11, 3.12.0-rc.1)	2m 24s
package-pypi / pypi-bdist (windows-2019, 3.7)	1m 27s
package-pypi / pypi-bdist (windows-2019, 3.8)	1m 40s
package-pypi / pypi-bdist (windows-2019, 3.9)	1m 27s
package-pypi / pypi-bdist (windows-2019, 3.10)	1m 55s
package-pypi / pypi-bdist (windows-2019, 3.11)	1m 44s
package-pypi / pypi-bdist (windows-2019, 3.12.0-rc.1)	3m 51s
package-pypi / pypi-sdist	29s
github-release	0s
	31m 50s

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