[CP-beta]Run tests on either iOS 17 or iOS 18 (#167216)

This pull request is created by [automatic cherry pick workflow](https://github.com/flutter/flutter/blob/main/docs/releases/Flutter-Cherrypick-Process.md#automatically-creates-a-cherry-pick-request)
Please fill in the form below, and a flutter domain expert will evaluate this cherry pick request.

### Issue Link:
What is the link to the issue this cherry-pick is addressing?

https://github.com/flutter/flutter/issues/148968

### Changelog Description:
Explain this cherry pick in one line that is accessible to most Flutter developers. See [best practices](https://github.com/flutter/flutter/blob/main/docs/releases/Hotfix-Documentation-Best-Practices.md) for examples

Update CI configurations and tests to use either iOS 17 or iOS 18 devices.

### Impact Description:
What is the impact (ex. visual jank on Samsung phones, app crash, cannot ship an iOS app)? Does it impact development (ex. flutter doctor crashes when Android Studio is installed), or the shipping production app (the app crashes on launch)

 Runs tests on either iOS 17 or iOS 18 devices.

### Workaround:
Is there a workaround for this issue?

No

### Risk:
What is the risk level of this cherry-pick?

### Test Coverage:
Are you confident that your fix is well-tested by automated tests?

### Validation Steps:
What are the steps to validate that this fix works?

N/A

.ci.yaml

@@ -286,7 +286,7 @@ platform_properties:
         ]
       os: Mac-14
       cpu: x86
-      device_os: iOS-17
+      device_os: iOS-17|iOS-18
       $flutter/osx_sdk : >-
         {
           "sdk_version": "16c5032a"
@@ -304,7 +304,7 @@ platform_properties:
         ]
       os: Mac-14
       cpu: x86
-      device_os: iOS-17
+      device_os: iOS-17|iOS-18
       $flutter/osx_sdk : >-
         {
           "sdk_version": "16c5032a"
@@ -322,7 +322,7 @@ platform_properties:
         ]
       os: Mac-14
       cpu: arm64
-      device_os: iOS-17
+      device_os: iOS-17|iOS-18
       $flutter/osx_sdk : >-
         {
           "sdk_version": "16c5032a"
@@ -5380,7 +5380,7 @@ targets:
         ["devicelab", "ios", "mac"]
       task_name: flutter_gallery__transition_perf_e2e_ios
       drone_dimensions: >
-        ["device_os=iOS-17","os=Mac-14", "cpu=x86"]
+        ["device_os=iOS-17|iOS-18","os=Mac-14", "cpu=x86"]
 
   - name: Mac_ios animated_blur_backdrop_filter_perf_ios__timeline_summary
     recipe: devicelab/devicelab_drone