Better CI for UI tests

[wmathurin]

• Fixed publication step (test.xcresult is not available for download after tests have run)
• Timeouts are configurable from the environment (and CI uses longer timeouts)
• Misc fixes

[wmathurin]

I'll revert that - that allows me to test in my fork (see https://github.com/wmathurin/SalesforceMobileSDK-iOS/actions/workflows/nightly.yaml)

[github-actions]

	Tests	Passed ☑️	Skipped	Failed ❌️
SalesforceSDKCore iOS ^18 Test Results	594 ran	593 ✅		1 ❌

Test	Result
SalesforceSDKCore iOS ^18 Test Results
DomainDiscoveryCoordinatorTests.testMalformedCallbackURL()	❌ failure

• View SalesforceSDKCore iOS ^18 Test Results

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.85%. Comparing base (d8a07b9) to head (3b43b4d).
⚠️ Report is 26 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #4002      +/-   ##
==========================================
- Coverage   66.89%   66.85%   -0.05%     
==========================================
  Files         254      254              
  Lines       22427    22427              
==========================================
- Hits        15003    14994       -9     
- Misses       7424     7433       +9     

Components	Coverage Δ
Analytics	70.78% <ø> (ø)
Common	69.76% <ø> (ø)
Core	59.58% <ø> (-0.07%)	⬇️
SmartStore	74.70% <ø> (ø)
MobileSync	87.41% <ø> (ø)
see 4 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[github-actions]

	Tests	Passed ☑️	Skipped	Failed ❌️
SalesforceSDKCore iOS ^26 Test Results	594 ran	592 ✅		2 ❌

Test	Result
SalesforceSDKCore iOS ^26 Test Results
DomainDiscoveryCoordinatorTests.testSpecialCharactersInLoginHint()	❌ failure
SFUserAccountManagerTests.testUserAccountEncoding	❌ failure

• View SalesforceSDKCore iOS ^26 Test Results

[wmathurin]

Here is what it looks like: https://github.com/wmathurin/SalesforceMobileSDK-iOS/actions/runs/22809167271

• Still a lot of flappers (they all run locally).
• The total counts / failure counts is a bit misleading (tests are run up to 3 times, and when a test fails its 3 runs, that counts as 3 failures).
• The test.xcresult (with screenshots) is published and can be downloaded for analysis.