[llvm] [Debuginfo] add debuginfod factory method (PR #154633)

[Daniel Thornburgh via llvm-commits]

================
@@ -567,10 +567,10 @@ Expected<std::string> DebuginfodCollection::findDebugBinaryPath(BuildIDRef ID) {
   return getCachedOrDownloadDebuginfo(ID);
 }
 
-DebuginfodServer::DebuginfodServer(DebuginfodLog &Log,
-                                   DebuginfodCollection &Collection)
-    : Log(Log), Collection(Collection) {
-  cantFail(
+Error DebuginfodServer::init(DebuginfodLog &Log,
+                                   DebuginfodCollection &Collection) {
+
+  Error Errd =
----------------
mysterymath wrote:

Idiomatically, there should be one `Err` variable that is reused throughout a routine.

https://github.com/llvm/llvm-project/pull/154633