[Clang] Requires expression incorrectly use non-static methods from generic lambda inside static method

[ksh4699]

Compiler Explorer: https://godbolt.org/z/66397fTff

struct Foo {
    static void f(auto) requires(false) {}
    void f(int) {}

    static void g() {
        static constexpr auto b = [](auto v) {
            return requires { f(v); };
        } (0);
        static_assert(b == false);
    }
};

Clang versions <= 18 and other compilers accept this program. The requires expression should be false, since f(0) is ill-formed in the context inside the lambda.

[llvmbot]

@llvm/issue-subscribers-clang-frontend

Author: None (ksh4699)

Compiler Explorer: https://godbolt.org/z/66397fTff

struct Foo {
    static void f(auto) requires(false) {}
    void f(int) {}

    static void g() {
        static constexpr auto b = [](auto v) {
            return requires { f(v); };
        } (0);
        static_assert(b == false);
    }
};

Clang versions <= 18 and other compilers accept this program. The requires expression should be false, since f(0) is ill-formed in the context inside the lambda.