[clang-tools-extra] [clang-tidy] Rename `cert-flp30-c` to `bugprone-avoid-float-loop-counter` (PR #166571)

[Victor Chernyakin via cfe-commits]

================
@@ -3,8 +3,9 @@
 cert-flp30-c
 ============
 
-This check flags ``for`` loops where the induction expression has a
-floating-point type.
+The `cert-flp30-c` check is an aliaes, please see
----------------
localspook wrote:

```suggestion
The `cert-flp30-c` check is an alias, please see
```

https://github.com/llvm/llvm-project/pull/166571