[clang] [NFC][Clang] Use range for loops in ClangDiagnosticsEmitter (PR #115573)

[Rahul Joshi via cfe-commits]

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@@ -1570,8 +1541,7 @@ static void emitDiagSubGroups(std::map<std::string, GroupInfo> &DiagsInGroup,
         for (auto const &Group : GroupsInPedantic) {
           const std::string &GroupName =
               std::string(Group->getValueAsString("GroupName"));
-          std::map<std::string, GroupInfo>::const_iterator RI =
-              DiagsInGroup.find(GroupName);
+          auto RI = DiagsInGroup.find(GroupName);
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jurahul wrote:

See above. auto seems ok here

https://github.com/llvm/llvm-project/pull/115573