Some target features are not available in CI tests

Some target features are not available in CI, so they may pose a risk of being skipped. This issue compiles a list of such target features for reference

{
    "aarch64{,_be}": [
        "cssc",
        "ecv",
        "faminmax",
        "fp8",
        "fp8dot2",
        "fp8dot4",
        "fp8fma",
        "fpmr",
        "lse128",
        "lut",
        "pauth-lr",
        "rcpc3",
        "sme2",
        "sme2p1",
        "sme-b16b16",
        "sme-f16f16",
        "sme-f8f16",
        "sme-f8f32",
        "sme-lutv2",
        "ssbs",
        "ssve-fp8dot2",
        "ssve-fp8dot4",
        "ssve-fp8fma",
        "sve2p1",
        "sve-b16b16",
        "tme",
        "wfxt"
    ],
    "arm{,v7}": [
        "pmull",
        "crc",
        "aes",
        "sha2",
        "i8mm",
        "dotprod"
    ],
    "riscv32": [
        "unaligned-vector-mem",
        "zicntr",
        "zihpm",
        "zihintpause",
        "zimop",
        "zawrs",
        "zam",
        "q",
        "zfinx",
        "zdinx",
        "zhinx",
        "zhinxmin",
        "zcb",
        "zcmop",
        "j",
        "p"
    ],
    "riscv64": [
        "unaligned-vector-mem",
        "zicntr",
        "zihpm",
        "zihintpause",
        "zimop",
        "zawrs",
        "zam",
        "q",
        "zfinx",
        "zdinx",
        "zhinx",
        "zhinxmin",
        "zcf",
        "zcb",
        "zcmop",
        "j",
        "p"
    ],
    "powerpc{,64}": [
        "vsx",
        "power8",
        "power8-altivec",
        "power8-vector",
        "power8-crypto",
        "power9",
        "power9-altivec",
        "power9-vector"
    ],
    "powerpc64le": [
        "power8",
        "power9",
        "power9-altivec",
        "power9-vector"
    ],
    "s390x": [
        "deflate-conversion",
        "enhanced-sort",
        "guarded-storage",
        "nnp-assist",
        "transactional-execution",
        "vector-packed-decimal",
        "vector-packed-decimal-enhancement",
        "vector-packed-decimal-enhancement-2"
    ],
    "loongarch64": [
        "frecipe",
        "div32",
        "lam-bh",
        "lamcas",
        "ld-seq-sa",
        "scq",
        "lbt",
        "lvz"
    ]
}

No file, test, or entry point is named; the issue only provides a reference list of target features by architecture. Start by locating the CI tests that exercise target-feature detection and compare their coverage with this list. Done would require an agreed scope and updated coverage or documentation for the missing features.