Fix VisionOS and WatchOS CI

[paulb777]

The -sdk option was missing for xcodebuild causing the builds and tests to run for macOS instead.

Three issues found and fixed or worked around:

• Missing VISION_OS ifdef in FIAM (may be more)
• The watch OS messaging sample app doesn't build for the watchOS target because of nanopb and promises having minimum version of 2.0 when Xcode 15 only supports down to 4.0.
• The spm tests don't build because of missing Firestore and Analytics. Probably sufficient for now to leave SPM testing to the individual products.

[ncooke3]

One of the failing tests is due to visionOS not being available for Firestore binary: https://github.com/firebase/firebase-ios-sdk/actions/runs/9084812253/job/24966694977?pr=12966#step:6:438

One option is to set the env var to build it from source for the visionOS flow.

[paulb777]

Thanks @ncooke3 - I'll make the update when I have a fix for the other Messaging Watch Sample app build problem.

[google-oss-bot]

	1 Warning
⚠️	Did you forget to add a changelog entry? (Add #no-changelog to the PR description to silence this warning.)

Generated by 🚫 Danger

[google-oss-bot]

Coverage Report ¹

Affected Products

• FirebaseInAppMessaging-iOS-FirebaseInAppMessaging.framework

  Overall coverage changed from ? (5a1763b) to 44.57% (b673e93) by ?.

  45 individual files with coverage change

  Filename	Base (5a1763b)	Merge (b673e93)	Diff
  CustomInAppMessageDisplayViewModifier.swift	?	0.00%	?
  FIRIAMActionURLFollower.m	?	52.78%	?
  FIRIAMActivityLogger.m	?	60.54%	?
  FIRIAMAnalyticsEventLoggerImpl.m	?	60.71%	?
  FIRIAMBannerViewController.m	?	0.00%	?
  FIRIAMBannerViewUIWindow.m	?	0.00%	?
  FIRIAMBaseRenderingViewController.m	?	0.00%	?
  FIRIAMBookKeeper.m	?	85.98%	?
  FIRIAMCardViewController.m	?	0.00%	?
  FIRIAMClearcutHttpRequestSender.m	?	0.00%	?
  FIRIAMClearcutLogger.m	?	62.50%	?
  FIRIAMClearcutLogStorage.m	?	62.00%	?
  FIRIAMClearcutUploader.m	?	90.23%	?
  FIRIAMClientInfoFetcher.m	?	61.98%	?
  FIRIAMDefaultDisplayImpl.m	?	1.63%	?
  FIRIAMDisplayCheckOnAnalyticEventsFlow.m	?	0.00%	?
  FIRIAMDisplayCheckOnAppForegroundFlow.m	?	0.00%	?
  FIRIAMDisplayCheckOnFetchDoneNotificationFlow.m	?	0.00%	?
  FIRIAMDisplayCheckTriggerFlow.m	?	0.00%	?
  FIRIAMDisplayExecutor.m	?	66.37%	?
  FIRIAMDisplayTriggerDefinition.m	?	68.42%	?
  FIRIAMElapsedTimeTracker.m	?	92.31%	?
  FIRIAMFetchFlow.m	?	80.35%	?
  FIRIAMFetchOnAppForegroundFlow.m	?	0.00%	?
  FIRIAMFetchResponseParser.m	?	86.11%	?
  FIRIAMImageOnlyViewController.m	?	0.00%	?
  FIRIAMMessageClientCache.m	?	78.36%	?
  FIRIAMMessageContentDataWithImageURL.m	?	80.88%	?
  FIRIAMMessageDefinition.m	?	100.00%	?
  FIRIAMModalViewController.m	?	0.00%	?
  FIRIAMMsgFetcherUsingRestful.m	?	71.01%	?
  FIRIAMRenderingEffectSetting.m	?	100.00%	?
  FIRIAMRenderingWindowHelper.m	?	0.00%	?
  FIRIAMRuntimeManager.m	?	0.00%	?
  FIRIAMSDKModeManager.m	?	93.22%	?
  FIRIAMSDKSettings.m	?	0.00%	?
  FIRIAMServerMsgFetchStorage.m	?	0.00%	?
  FIRIAMTimeFetcher.m	?	0.00%	?
  FIRInAppMessaging+Bootstrap.m	?	0.00%	?
  FIRInAppMessaging.m	?	3.37%	?
  FIRInAppMessagingRenderingDataClasses.m	?	89.29%	?
  NSString+FIRInterlaceStrings.m	?	100.00%	?
  SwiftUIPreviewHelpers.swift	?	0.00%	?
  UIApplication+FIRForegroundWindowScene.m	?	0.00%	?
  UIColor+FIRIAMHexString.m	?	100.00%	?

Test Logs

• Merge (b673e93): https://github.com/firebase/firebase-ios-sdk/actions/runs/9087748926

1. https://storage.googleapis.com/firebase-sdk-metric-reports/1rD2z2t8kQ.html