WIP: [python-package] support sub-classing scikit-learn estimators #9527

Job	Run time
r-sanitizers (ubuntu-latest, R-devel, gcc ASAN/UBSAN)	6m 25s
r-package (clang16, R-devel)	6m 27s
r-sanitizers (ubuntu-latest, R-devel, clang ASAN/UBSAN)	6m 25s
r-package (ubuntu-latest, gcc, R 4.3, cmake)	6m 27s
r-package (clang17, R-devel)	6m 26s
r-package (ubuntu-latest, clang, R 4.3, cmake)	6m 26s
r-package (clang18, R-devel)	6m 26s
r-package (clang19, R-devel)	6m 27s
r-package (macos-13, gcc, R 4.3, cmake)	6m 35s
r-package (gcc14, R-devel)	6m 25s
r-package (macos-13, clang, R 4.3, cmake)	6m 40s
r-package (intel, R-devel)	6m 22s
r-package (windows-latest, MINGW, R 3.6, cmake)	6m 22s
r-package (rchk, R-devel)	6m 25s
r-package (windows-latest, MINGW, R 4.3, cmake)	6m 25s
r-package (windows-2019, MSVC, R 3.6, cmake)	6m 32s
r-package (windows-2022, MSVC, R 4.3, cmake)	7m 24s
r-package (windows-latest, MINGW, R 3.6, cran)	6m 37s
r-package (windows-latest, MINGW, R 4.3, cran)	6m 25s
r-package (ubuntu-latest, gcc, R 4.3, cran)	6m 26s
r-package (macos-13, clang, R 4.3, cran)	6m 25s
r-package (macos-14, clang, R 4.3, cran)	6m 16s
all-r-package-jobs-successful	1s
	2h 22m 49s

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