Demote two log messages issued on the error level

Just two cases where we were logging an error that wasn’t strictly necessary and was just spamming the log at the high log levels.

Author: ahoppen

Sources/SourceKitLSP/SourceKitLSPServer.swift

@@ -1764,7 +1764,7 @@ extension SourceKitLSPServer {
     // `SwiftLanguageService` will always respond with `unsupported method`. Thus, only log such a failure instead of
     // returning it to the client.
     if indexBasedResponse.isEmpty {
-      return await orLog("Fallback definition request") {
+      return await orLog("Fallback definition request", level: .info) {
         return try await languageService.definition(req)
       }
     }

Sources/SourceKitLSP/Swift/SyntacticTestIndex.swift

@@ -178,6 +178,11 @@ actor SyntacticTestIndex {
     guard !removedFiles.contains(uri) else {
       return
     }
+    guard FileManager.default.fileExists(atPath: url.path) else {
+      // File no longer exists. Probably deleted since we scheduled it for indexing. Nothing to worry about.
+      logger.info("Not indexing \(uri.forLogging) for tests because it does not exist")
+      return
+    }
     guard
       let fileModificationDate = try? FileManager.default.attributesOfItem(atPath: url.path)[.modificationDate]
         as? Date