[llvm] [Tablegen] Add keywork `dump`. (PR #68793)

[Wang Pengcheng via llvm-commits]

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@@ -170,4 +170,11 @@ void CheckAssert(SMLoc Loc, Init *Condition, Init *Message) {
   }
 }
 
+void CheckDump(SMLoc Loc, Init *Message) {
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wangpc-pp wrote:

This is not a `check` I think, it does the `dump`.
Change it to `Dump`, `DoDump` or other more precise name?

https://github.com/llvm/llvm-project/pull/68793