GCC Rust build and test

Create base class `AssociatedItem` #6281

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Run time

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Job	Run time
build-and-check-clang-macos	40m 52s
build-and-check-ubuntu-32bit	32m 18s
build-and-check-gcc-48	32m 36s
build-and-check-ubuntu-64bit	29m 45s
	2h 15m 31s