[OIDAuthorizationSession resumeExternalUserAgentFlowWithURL:] crash

**Describe the bug**
An OAuth redirect was sent to a OIDExternalUserAgentSession after it already completed. - An OAuth redirect was sent to a OIDExternalUserAgentSession after it already completed.

**To Reproduce**
Fatal Exception: An OAuth redirect was sent to a OIDExternalUserAgentSession after it already completed.
0 CoreFoundation 0x11a21c __exceptionPreprocess
1 libobjc.A.dylib 0x31abc objc_exception_throw
2 CoreFoundation 0x178ea0 -[NSException initWithCoder:]
3 Blueground 0x37ef5c -[OIDAuthorizationSession resumeExternalUserAgentFlowWithURL:] + 137 (OIDAuthorizationService.m:137)
4 Blueground 0x372eb0 -[GIDSignIn handleURL:] + 200 (GIDSignIn.m:200)
5 Blueground 0x366ca8 protocol witness for GoogleSignInProvider.handle(_:) in conformance GIDSignIn ()
6 Blueground 0x366b74 @objc GoogleSignInService.application(_:open:options:) + 21 (GoogleSignInService.swift:21)
7 Blueground 0x1ae3a0 AppDelegate.application(_:open:options:) + 224 (AppDelegate.swift:224)
8 Blueground 0x1ae604 @objc AppDelegate.application(_:open:options:) ()
9 Blueground 0x4a2d60 -[GULAppDelegateSwizzler application:openURL:options:] + 698 (GULAppDelegateSwizzler.m:698)
10 UIKitCore 0x1189c8c __58-[UIApplication _applicationOpenURLAction:payload:origin:]_block_invoke
11 UIKitCore 0x11896e0 -[UIApplication _applicationOpenURLAction:payload:origin:]
12 UIKitCore 0x163c35c -[_UIOpenURLApplicationBSActionHandler _respondToApplicationActions:fromTransitionContext:]
13 UIKitCore 0x238ffc -[UIApplication _handleNonLaunchSpecificActions:forScene:withTransitionContext:completion:]
14 UIKitCore 0x16bc48 -[UIScene _emitSceneSettingsUpdateResponseForCompletion:afterSceneUpdateWork:]
15 UIKitCore 0x16b9f4 -[UIScene scene:didUpdateWithDiff:transitionContext:completion:]
16 UIKitCore 0x2c43e0 -[UIApplicationSceneClientAgent scene:handleEvent:withCompletion:]
17 FrontBoardServices 0x24094 __76-[FBSScene updater:didUpdateSettings:withDiff:transitionContext:completion:]_block_invoke.146
18 FrontBoardServices 0x1f6fc -[FBSScene _callOutQueue_coalesceClientSettingsUpdates:]
19 FrontBoardServices 0x23dc0 -[FBSScene updater:didUpdateSettings:withDiff:transitionContext:completion:]
20 FrontBoardServices 0x26ca0 __94-[FBSWorkspaceScenesClient _queue_updateScene:withSettings:diff:transitionContext:completion:]_block_invoke_2
21 FrontBoardServices 0x1ed38 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:]
22 FrontBoardServices 0x26bcc __94-[FBSWorkspaceScenesClient _queue_updateScene:withSettings:diff:transitionContext:completion:]_block_invoke.cold.1
23 FrontBoardServices 0x26a40 __94-[FBSWorkspaceScenesClient _queue_updateScene:withSettings:diff:transitionContext:completion:]_block_invoke
24 libdispatch.dylib 0x1b584 _dispatch_client_callout
25 libdispatch.dylib 0x6ab0 _dispatch_block_invoke_direct
26 FrontBoardServices 0x1e8ac __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__
27 FrontBoardServices 0x1e748 -[FBSMainRunLoopSerialQueue _targetQueue_performNextIfPossible]
28 FrontBoardServices 0x1e7b0 -[FBSMainRunLoopSerialQueue _performNextFromRunLoopSource]
29 CoreFoundation 0xfa8c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
30 CoreFoundation 0xf8a4 __CFRunLoopDoSource0
31 CoreFoundation 0xf700 __CFRunLoopDoSources0
32 CoreFoundation 0x10080 __CFRunLoopRun
33 CoreFoundation 0x11c3c CFRunLoopRunSpecific
34 GraphicsServices 0x1454 GSEventRunModal
35 UIKitCore 0x135274 -[UIApplication _run]
36 UIKitCore 0x100a28 UIApplicationMain
37 UIKitCore 0x1e2168 __51-[UIStatusBar_Base _setHidden:animationParameters:]_block_invoke_4
38 Blueground 0x1af440 main (AppDelegate.swift)
39 ??? 0x1aaf1ff08 (Missing)

**Expected behavior**
Not to crash.

**Environment**
- Device: Iphone
- OS: iOS 18.x
- Google Sign-in SDK: v 9.0