[clang] [analyzer][NFC] Introduce framework for checker families (PR #139256)

[Balazs Benics via cfe-commits]

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@@ -64,9 +65,9 @@ class CheckerFn<RET(Ps...)> {
   Func Fn;
 
 public:
-  CheckerBase *Checker;
+  CheckerBackend *Checker;
 
-  CheckerFn(CheckerBase *checker, Func fn) : Fn(fn), Checker(checker) {}
+  CheckerFn(CheckerBackend *checker, Func fn) : Fn(fn), Checker(checker) {}
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steakhal wrote:

I wish we wouldn't need to rename all the `CheckerBase` spellings.

https://github.com/llvm/llvm-project/pull/139256