[llvm] [OFFLOAD] Add asynchronous queue query API for libomptarget migration (PR #172231)

[Kevin Sala Penades via llvm-commits]

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@@ -125,3 +125,15 @@ def olLaunchHostFunction : Function {
   ];
   let returns = [];
 }
+
+def olQueryAsync : Function {
+    let desc = "Query for queue work completion on in a non-blocking manner.";
+    let details = [
+      "The function checks if a queue work has completed without blocking the calling thread.",
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kevinsala wrote:

"if a queue has completed enqueued work"

https://github.com/llvm/llvm-project/pull/172231