Clean up vhswish and vlrelu microkernel tests #409

Job	Run time
build-and-test / cmake-linux-x86_64	2m 33s
build-and-test / cmake-linux-aarch64	2m 54s
build-and-test / cmake-linux-armhf	2m 29s
build-and-test / cmake-linux-riscv64	6m 30s
build-and-test / cmake-linux-riscv64-rvv	2m 31s
build-and-test / cmake-windows-arm64	4m 31s
build-and-test / bazel-linux-x86_64-clang-18	9m 13s
build-and-test / bazel-linux-aarch64	8m 28s
build-and-test / bazel-linux-x86_64-gcc-9	5m 13s
build-and-test / cmake-ios-arm64	7m 14s
build-and-test / cmake-ios-x86_64	7m 15s
build-and-test / cmake-android (arm64)	2m 10s
build-and-test / cmake-android (armv7)	2m 15s
build-and-test / cmake-macos-arm64	1m 43s
build-and-test / cmake-android (x86)	2m 51s
build-and-test / cmake-windows-x64	5m 17s
build-and-test / cmake-windows-x86	5m 32s
	1h 18m 39s

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