NSInternalInconsistencyException crash - Actions added to UIAlertController of style UIAlertActionStyleCancel must have a title when running in UIUserInterfaceIdiomPhone/Pad

**Describe the bug**
- One of your localized strings for the cancel action is being returned as an empty string and crashing our app.
- I suspect the issue is either on [this](https://github.com/google/GoogleSignIn-iOS/blob/main/GoogleSignIn/Sources/GIDEMMErrorHandler.m#L213) line of code or [this](https://github.com/google/GoogleSignIn-iOS/blob/main/GoogleSignIn/Sources/GIDEMMErrorHandler.m#L225) one

**To Reproduce**

When logging in your API needs to return the following [error code](https://github.com/google/GoogleSignIn-iOS/blob/main/GoogleSignIn/Sources/GIDEMMErrorHandler.m#L31C1-L32C1).
One of your locales might be returning that empty string. We support the following in our app: 

**Expected behavior**
App not to crash when that error is returned by your API

**Screenshots**

**Environment**
- Device: iPhone 11, iPhone 12 Pro Max, iPhone 15 Pro Max, iPad Pro 13-inch (M4
- OS: iOS 17.5.1, 17.6.1, iOS 18.0.1, iPad OS 17.5.1
- Browser: [ e.g. Safari, Chrome, etc ]
- GoogleSignIn SDK version: `7.1.0`

**Additional context**

[stack_trace_phone.txt](https://github.com/user-attachments/files/17308491/stack_trace_phone.txt)
[stack_trace_pad.txt](https://github.com/user-attachments/files/17308492/stack_trace_pad.txt)

Start in GoogleSignIn/Sources/GIDEMMErrorHandler.m, especially the localized cancel-action paths around lines 213 and 225, and compare them with stack_trace_phone.txt and stack_trace_pad.txt. Reproduce the API error code described in the issue using the supported locales. Done means that error no longer crashes on iPhone or iPad when a locale supplies an empty cancel string.

由索引模型根据 Issue 内容生成。