[lld] [lldb] [llvm] [Support][Cache] Make `pruneCache` return an `Expected` (PR #191367)

[Juan Manuel Martinez Caamaño via llvm-commits]

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@@ -1212,7 +1212,13 @@ void ThinLTOCodeGenerator::run() {
     }
   }
 
-  pruneCache(CacheOptions.Path, CacheOptions.Policy, ProducedBinaries);
+  Expected<bool> PrunedOrErr =
+      pruneCache(CacheOptions.Path, CacheOptions.Policy, ProducedBinaries);
+  if (!PrunedOrErr) {
+    // Log the error but continue execution: failure to prune the cache is not
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jmmartinez wrote:

@teresajohnson If this last behavior is ok, I'd like to land this patch.

https://github.com/llvm/llvm-project/pull/191367