mlaunch: Improve output when failing to install app on device because the device is locked

[rolfbjarne]

Sample output:

INFO: /Users/ema/Library/Caches/Xamarin/XMA/SDKs/dotnet/packs/Microsoft.iOS.Sdk.net9.0_18.0/18.0.9600-net9-rc2/tools/bin/mlaunch --devname "Ema's iPhone 15 Pro" --installdev "/Users/ema/Library/Caches/Xamarin/mtbs/builds/MauiApp25/595cb581a5f7090bc1eecc32d178e5faa1f105165bc54b8c89c16c81548aab4a/bin/Debug/net9.0-ios/ios-arm64/device-builds/iphone16.2-18.0.1/MauiApp25.app" --install-progress --sdkroot "/Applications/Xcode_16.0.0.app/Contents/Developer" -sdk 0.0
INFO: Deploying MauiApp25 on Ema's iPhone 15 Pro...
INFO:                        FunctionName = -[PersonalizedImage mountRemoteImage:serverTicket:imageDigest:trustCacheURL:error:]
INFO:                        Failed to mount /private/var/tmp/CoreDevice_DDI_Staging_501/0DC75A3D-6BB2-4EF8-A0ED-1AE74E1900B9/Restore/022-16019-313.dmg: 0xe80000e2 (kAMDMobileImageMounterDeviceLocked: The device is locked.) (com.apple.mobiledevice error -402652958 (0xE80000E2))
INFO:                    LineNumber = 2068
INFO: 16:41:40  Enabling developer disk image services.
INFO: ERROR: The developer disk image could not be mounted on this device. (com.apple.dt.CoreDeviceError error 12040 (0x2F08))
INFO:        Options = {
INFO:            MountedBundlePath = "file:///private/var/tmp/CoreDevice_DDI_Staging_501/0DC75A3D-6BB2-4EF8-A0ED-1AE74E1900B9/";
INFO:        DeviceIdentifier = 0DC75A3D-6BB2-4EF8-A0ED-1AE74E1900B9
INFO: xcrun devicectl -j /var/folders/k6/n_65pl1n0pv2pb6qnwpdzv300000gn/T/tmpzh0sz4.tmp device install app --device "Ema's iPhone 15 Pro" /Users/ema/Library/Caches/Xamarin/mtbs/builds/MauiApp25/595cb581a5f7090bc1eecc32d178e5faa1f105165bc54b8c89c16c81548aab4a/bin/Debug/net9.0-ios/ios-arm64/device-builds/iphone16.2-18.0.1/MauiApp25.app
INFO:        DDIPath = /Library/Developer/DeveloperDiskImages/iOS_DDI.dmg
INFO:                    FunctionName = -[PersonalizedImage mountImage:]
INFO:            NSLocalizedRecoverySuggestion = Unlock the device and try again.
INFO:        ----------------------------------------
INFO:                Error mounting image: 0xe80000e2 (kAMDMobileImageMounterDeviceLocked: The device is locked.) (com.apple.mobiledevice error -402652958 (0xE80000E2))
INFO:                FunctionName = AMDeviceRemoteMountPersonalizedBundle
INFO:                LineNumber = 2145
INFO:        ----------------------------------------
INFO:                    Failed to mount image: 0xe80000e2 (kAMDMobileImageMounterDeviceLocked: The device is locked.) (com.apple.mobiledevice error -402652958 (0xE80000E2))
INFO:        NSURL = file:///Library/Developer/DeveloperDiskImages/iOS_DDI.dmg
INFO:        }
INFO:            UseCredentials = 0;

We should do better than this.