Secrets recovery: Fix an issue where the Secrets Reset screen would open twice.

[nimau]

This PR fixes the following issues when resetting secrets:

• SecureBackupSetupIntroViewController is pushed twice into the navigation router (once as a view controller, once via its navigation controller)
• SecureBackupSetupCoordinator is never removed from child coordinators

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.14 🎉

Comparison is base (cb7f6a7) 12.22% compared to head (0240e35) 12.37%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #7404      +/-   ##
===========================================
+ Coverage    12.22%   12.37%   +0.14%     
===========================================
  Files         1646     1646              
  Lines       163369   163381      +12     
  Branches     67067    67088      +21     
===========================================
+ Hits         19975    20215     +240     
+ Misses      142750   142502     -248     
- Partials       644      664      +20     

Flag	Coverage Δ
uitests	55.06% <ø> (ø)
unittests	6.21% <0.00%> (+0.14%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...s/Secrets/Recover/SecretsRecoveryCoordinator.swift	0.00% <0.00%> (ø)
...odules/Secrets/Reset/SecretsResetCoordinator.swift	0.00% <0.00%> (ø)
...les/Secrets/Reset/SecretsResetViewController.swift	0.00% <0.00%> (ø)
.../Modules/Secrets/Reset/SecretsResetViewModel.swift	0.00% <0.00%> (ø)
...ureBackup/Setup/SecureBackupSetupCoordinator.swift	0.00% <0.00%> (ø)

... and 15 files with indirect coverage changes

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[aringenbach]

LGTM