chore: upgrade iOS Simulator version in Sauce tests to 14.0

[web-padawan]

Description

Follow-up to #2253

It seems like SauceLabs no longer provides iOS 10.3 which could be possibly related to Appium 2 migration.

Here's the error from the most recent PR build for #2254.

Error: Misconfigured -- Unsupported OS/browser/version/device combo: OS: 'unspecified', Browser: 'iphone', Version: '10.3.', Device: 'iPhone Simulator'

Let's try upgrading to a more recent version which to see if tests can run in that version.

Type of change

• Internal change