[clang] [llvm] [Clang][RISCV] Move getVScaleRange logic into libLLVMFrontendDriver. NFC (PR #77327)

[Thorsten Schütt via cfe-commits]

================
@@ -2,6 +2,7 @@ set(LLVM_LINK_COMPONENTS
   Support
   TargetParser
   FrontendOpenMP
+  FrontendDriver
----------------
tschuett wrote:

I would prefer putting it into FrontendDriver for style and as a precedence to encourage others to put more into the frontend.

https://github.com/llvm/llvm-project/pull/77327