[NFC][lldb-dap] Fix typo in invalidated event (llvm#158338)

Fixed a typo in the `invalidated` event according to
[DAP](https://microsoft.github.io/debug-adapter-protocol/specification#Events_Invalidated)
specification. While the field is `frameId` elsewhere, it must be
`stackFrameId` in this event.

Author: DrSergei

lldb/tools/lldb-dap/Protocol/ProtocolEvents.cpp

@@ -51,8 +51,8 @@ llvm::json::Value toJSON(const InvalidatedEventBody &IEB) {
   json::Object Result{{"areas", IEB.areas}};
   if (IEB.threadId)
     Result.insert({"threadID", IEB.threadId});
-  if (IEB.frameId)
-    Result.insert({"frameId", IEB.frameId});
+  if (IEB.stackFrameId)
+    Result.insert({"stackFrameId", IEB.stackFrameId});
   return Result;
 }
 

lldb/tools/lldb-dap/Protocol/ProtocolEvents.h

@@ -83,7 +83,7 @@ struct InvalidatedEventBody {
 
   /// If specified, the client only needs to refetch data related to this stack
   /// frame (and the `threadId` is ignored).
-  std::optional<uint64_t> frameId;
+  std::optional<uint64_t> stackFrameId;
 };
 llvm::json::Value toJSON(const InvalidatedEventBody::Area &);
 llvm::json::Value toJSON(const InvalidatedEventBody &);

lldb/unittests/DAP/ProtocolTypesTest.cpp

@@ -1078,13 +1078,13 @@ TEST(ProtocolTypesTest, InvalidatedEventBody) {
   InvalidatedEventBody body;
   body.areas = {InvalidatedEventBody::eAreaStacks,
                 InvalidatedEventBody::eAreaThreads};
-  body.frameId = 1;
+  body.stackFrameId = 1;
   StringRef json = R"({
   "areas": [
     "stacks",
     "threads"
   ],
-  "frameId": 1
+  "stackFrameId": 1
 })";
   EXPECT_EQ(json, pp(body));
 }