GH runner macos: Add cross-compilation to x86_64 based on the Cirrus CI job #4159

Job	Run time
TEST (I6400, mipsisa64r6el-linux-gnuabi64, NO_SHARED=1 TARGET=I6400)	20m 3s
TEST (MIPS64_GENERIC, mips64el-linux-gnuabi64, NO_SHARED=1 TARGET=MIPS64_GENERIC)	20m 3s
TEST (P6600, mipsisa64r6el-linux-gnuabi64, NO_SHARED=1 TARGET=P6600)	20m 3s
TEST (SICORTEX, mips64el-linux-gnuabi64, NO_SHARED=1 TARGET=SICORTEX)	1m 1s
TEST (I6500, mipsisa64r6el-linux-gnuabi64, NO_SHARED=1 TARGET=I6500)	20m 3s
	1h 21m 13s

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