[clang-tools-extra] [NFC] Complete proper copying and resource cleanup in classes. (PR #118655)

[Aaron Ballman via cfe-commits]

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@@ -81,6 +81,9 @@ class ClangTidyContext {
 
   ~ClangTidyContext();
 
+  ClangTidyContext(const ClangTidyContext &) = default;
+  ClangTidyContext &operator=(const ClangTidyContext &) = default;
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AaronBallman wrote:

I think these would make more sense as `= delete;` so that we prevent accidental copies of the context object. (We want this passed around by reference or pointer only.)

https://github.com/llvm/llvm-project/pull/118655