fix: run xCode 16 on macos 15

[kirillzyusko]

📜 Description

An attempt to fix iOS 18 e2e tests.

💡 Motivation and Context

First of all I ahd to run e2e tests on macos-15 runner because of a recent changes introduced in actions/runner-images#10703

I did it, but then turned out, that macos-15 doesn't have iPhone 14 by default. I re-generated assets for iPhone 16 Pro, now e2e tests can start successfully, but for some reasons they don't want to pass - many of tests that rely on matching screenshots detects a difference. Unfortunately I can not detect the diff, because we exceed 90 minutes.

Taking all information above I decided, that current changes are good enough to be merged - later on I can restore iOS 18 e2e tests in CI, but tight now I want to unblock the process of merging other important PRs.

Also iOS 18 tests were not very stable. When I added them I used older macos and older iOS to generate screenshots. Now I updated to necessary XCode version, so I should be able to have 1:1 environment, let's see!

📢 Changelog

E2E

• changed iPhone 14 to iPhone 16 Pro (to match previous versions);
• regenerated assets;
• lock simulator18 version;

CI

• run iOS 18 tests on macos-15;
• exclude iOS 18 testing from CI;

🤔 How Has This Been Tested?

Tested on CI.

📝 Checklist

• CI successfully passed
• I added new mocks and corresponding unit-tests if library API was changed

[github-actions]

📊 Package size report

Current size	Target Size	Difference
159580 bytes	159580 bytes	0 bytes 📉