remove macos-11 tests from github actions #873

Job	Run time
Linux x64 check results consistency	21s
macos-12	29s
macos-latest	24s
QEMU ARM	36s
Linux x64 cmake unofficial build test	12s
QEMU AARCH64	1m 2s
Linux x64 misc tests	1m 4s
QEMU PPC64LE	1s
Ubuntu Node 16.x WebAssembly/asm.js tests	50s
QEMU PPC64	1s
Windows mingw64	48s
Ubuntu Node 17.x WebAssembly/asm.js tests	53s
QEMU S390X	1s
VC++ 2022, x64	48s
Windows mingw32	49s
Ubuntu Node 18.x WebAssembly/asm.js tests	1m 1s
QEMU MIPS	1s
VC++ 2022, Win32	48s
QEMU M68K	17s
VC++ 2022, ARM	55s
VC++ 2022, ARM64	49s
QEMU RISC-V	1s
CC=cc, ubuntu-latest	1s
VC++ 2019, x64	57s
CC=gcc, ubuntu-latest	1s
QEMU SPARC	1s
VC++ 2019, Win32	50s
CC=gcc-13, ubuntu-22.04	1s
VC++ 2019, ARM	53s
QEMU ARM, gcc-10	1s
CC=gcc-12, ubuntu-22.04	1s
QEMU AARCH64, gcc-10	31s
VC++ 2019, ARM64	57s
CC=gcc-11, ubuntu-22.04	1s
QEMU PPC64LE, gcc-10	1s
CC=gcc-10, ubuntu-22.04	1s
QEMU PPC64, gcc-10	1s
CC=gcc-9, ubuntu-22.04	1s
QEMU S390X, gcc-10	1s
CC=gcc-8, ubuntu-20.04	1s
QEMU MIPS, gcc-10	1s
CC=gcc-7, ubuntu-20.04	1s
QEMU ARM, gcc-9	1s
QEMU PPC64LE, gcc-9	1s
QEMU PPC64, gcc-9	1s
CC=clang, ubuntu-latest	1s
QEMU S390X, gcc-9	1s
CC=clang-15, ubuntu-22.04	1s
QEMU MIPS, gcc-9	1s
CC=clang-14, ubuntu-22.04	1s
QEMU ARM, gcc-8	1s
CC=clang-13, ubuntu-22.04	1s
QEMU PPC64LE, gcc-8	1s
CC=clang-12, ubuntu-22.04	1s
QEMU PPC64, gcc-8	1s
CC=clang-11, ubuntu-22.04	1m 9s
QEMU S390X, gcc-8	1s
CC=clang-10, ubuntu-20.04	1s
CC=clang-9, ubuntu-20.04	1s
CC=clang-8, ubuntu-20.04	1s
CC=clang-7, ubuntu-20.04	1s
CC=clang-6.0, ubuntu-20.04	1s
	18m 2s

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