MuonPrepData: noexcept_moveable for vector optimization

In some places in the code prepData is used directly in a std::vector, without noexcept move operators this causes copying whenever the vector expands. Making the move operators noexcept allows optimization.

I also make minor changes suggested by clang-tidy

cc @ssnyder, I had to make adjustments to CachedUniquePtrT

Control/CxxUtils/Root/StringUtils.cxx

@@ -705,7 +705,7 @@ namespace CxxUtils {
 	  case '$':
 	    {
 	      // find the end of the math block
-	      size_t endpos = latex.find("$",nextpos+1);
+	      size_t endpos = latex.find('$',nextpos+1);
 	      if(endpos == std::string::npos){
 		// it's unterminated, break
 		retval += latex.substr(pos);