tests

Remove loadable feature references #803

Job	Run time
Building macOS libraries	3m 39s
Building Linux libraries	37s
Building Windows libraries	3m 25s
Testing with Valgrind on ubuntu-latest	1m 31s
Build XCFramework	9m 16s
Building Android libraries	4m 13s
build_stable_rust	1m 54s
Basic WASM build	2m 1s
Rust unit tests on macos-latest	2m 1s
Rust unit tests on ubuntu-24.04	2m 27s
Testing on ${{ matrix.os }}	0s
	31m 4s

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