clang-tidy: more patterns for `readability-use-std-min-max`

[mathstuf]

The following patterns should also be detected:

if (a >= k) a = k - 1; // a = std::min(a, k - 1);
if (a + c > k) a = k - c; // a = std::min(a, k - c);

[llvmbot]

@llvm/issue-subscribers-clang-tidy

Author: Ben Boeckel (mathstuf)

The following patterns should also be detected:

if (a >= k) a = k - 1; // a = std::min(a, k - 1);
if (a + c > k) a = k - c; // a = std::min(a, k - c);

[mathstuf]

I also found:

if (a > b) return a;
return b;

[mathstuf]

There's also the nested conditional:

a = a < l ? l : (h < a ? h : a);

[AmrDeveloper]

I am interested to work on it, if it it is confirmed and has priority :D

[chrchr-github]

Related: #109017 #108022