Set CI RunTests command retries default to 0, use 3 only for running unit tests.

Tools/Sources/Commands/CI/RunTests.swift

@@ -25,7 +25,7 @@ struct RunTests: AsyncParsableCommand {
     var osVersion = "26.1"
     
     @Option(help: "Number of times to retry failed tests. Only the failing tests are re-run, not the entire suite.")
-    var retries = 3
+    var retries = 0
     
     @Option(help: "When set, create a simulator with this name if one doesn't already exist.")
     var createSimulatorName: String?

Tools/Sources/Commands/CI/UnitTests.swift

@@ -23,7 +23,8 @@ struct UnitTests: AsyncParsableCommand {
             try await RunTests.parse([
                 "--scheme", "UnitTests",
                 "--device", device,
-                "--os-version", osVersion
+                "--os-version", osVersion,
+                "--retries", "3"
             ]).run()
         } catch {
             failures.append("Unit tests failed: \(error)")