Remove FXIOS-6036 [v117] clean up coordinator code

[lmarceau]

📜 Tickets

Jira ticket
Github issue

💡 Description

Removing the old code path without coordinators in v117. This is a bigger PR so if we ever want to look how things were done before, we have 1 PR only to look at to have the overview.

• Remove the coordinator feature flag
• Remove unneeded deeplink code (with NavigationRouter and QuickActions)
• Remove setup of BVC in SceneDelegate
• Removing code unneeded in BVC (369 lines 🎉 more to come with subsequent coordinator code).

📝 Checklist

You have to check all boxes before merging

• Filled in the above information (tickets numbers and description of your work)
• Updated the PR name to follow our PR naming guidelines
• Wrote unit tests and/or ensured the tests suite is passing
• When working on UI, I checked and implemented accessibility (minimum Dynamic Text and VoiceOver)
• If needed I updated documentation / comments for complex code and public methods

[adudenamedruby]

Very nice

[mergify]

This pull request has conflicts when rebasing. Could you fix it @lmarceau? 🙏

[mobiletest-ci-bot]

	Warnings
⚠️	Pull Request size seems relatively large. If this Pull Request contains multiple changes, please split each into separate PR will helps faster, easier review. Consider using epic branches for work that would affect main.

	Messages
📖	Project coverage: 34.27%
📖	Edited 25 files
📖	Created 0 files

Client.app: Coverage: 32.6

File	Coverage
CoordinatorFlagManager.swift	61.11%	✅
ErrorPageHelper.swift	0.0%	⚠️
PasswordManagerListViewController.swift	29.93%	⚠️
RecentlyClosedTabsPanel.swift	0.0%	⚠️
HomepageViewController.swift	36.35%	⚠️
SurveySurfaceViewController.swift	3.08%	⚠️
QuickActions.swift	0.0%	⚠️
DefaultBrowserOnboardingViewController.swift	3.61%	⚠️
SceneDelegate.swift	18.52%	⚠️
BrowserViewController+TabToolbarDelegate.swift	11.68%	⚠️
SearchTelemetry.swift	5.63%	⚠️
NimbusFlaggableFeature.swift	98.5%	✅
BrowserViewController+WebViewDelegates.swift	2.08%	⚠️
ScreenshotHelper.swift	5.32%	⚠️
BrowserViewController+KeyCommands.swift	0.0%	⚠️
YourRightsSetting.swift	0.0%	⚠️
BrowserViewController+DownloadQueueDelegate.swift	0.0%	⚠️
SurveySurfaceManager.swift	97.96%	✅
NimbusFeatureFlagLayer.swift	76.98%	✅
BrowserViewController+URLBarDelegate.swift	2.37%	⚠️
BrowserViewController.swift	13.55%	⚠️

Generated by 🚫 Danger Swift against d4a0517