Fine tune unit tests to improve reliability

[bwaresiak]

Task/Issue URL: https://app.asana.com/0/856498667320406/1208724390819804/f
Tech Design URL:
CC:

Description:

• Separate out WebView/WebKit tests to a new target.
• Add long-living WebView to host app view hierarchy.
• Disable flaky tests.
• Tweak how we wait for expectations when structured concurrency is involved.

Steps to test this PR:

Run tests :)

Definition of Done (Internal Only):

• Does this PR satisfy our Definition of Done?

Copy Testing:

• Use of correct apostrophes in new copy, ie ’ rather than '

Orientation Testing:

• Portrait
• Landscape

Device Testing:

• iPhone SE (1st Gen)
• iPhone 8
• iPhone X
• iPhone 14 Pro
• iPad

OS Testing:

• iOS 15
• iOS 16
• iOS 17

Theme Testing:

• Light theme
• Dark theme

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Internal references:

Software Engineering Expectations
Technical Design Template

[github-actions]

	Warnings
⚠️	PR has more than 500 lines of code changing. Consider splitting into smaller PRs if possible.

Generated by 🚫 dangerJS against 5faa2c8

[samsymons]

LGTM, added one note about the warmupWebView logic since it causes a consistent failure for me locally (but not on CI?), otherwise just some small cosmetic comments. Nice work!

[samsymons]

New changes look good, thanks @bwaresiak! I re-ran the workflows a few times and everything was green every time, great work!