[clang-tools-extra] [clang-tidy] Add frames for bugprone-exception-escape options (PR #187971)

[Baranov Victor via cfe-commits]

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@@ -134,6 +144,10 @@ class ExceptionAnalyzer {
     /// based on analyzer configuration.
     bool ThrowsUnknown = false;
 
+    /// Location info for the assumed-throwing function when ThrowsUnknown is
+    /// true. May be invalid if no location is available.
+    ThrowInfo UnknownThrowInfo;
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vbvictor wrote:

Can we not add new fields here.
I think we can still reuse `ThrownExceptions` variable for storing exceptions.
Inside `const Type*` put `nullptr` (unknown type)

Also, all added methods should be removed since they will not be used anymore

https://github.com/llvm/llvm-project/pull/187971