Move the attachment navigation bar into a container.

[pixlwave]

The navigation bar wasn't using the safe area correctly, so it is now inside of a container that ignores the safe area and the top of the bar is aligned to the top of the safe area.

Realistically this view should use a Navigation Controller but this interferes animations so I've themed the container to match the nav bar. One down side of this is that it won't gain the system material when we enable the new app layout 😕

Fixes #6486.

Light Mode	Dark Mode	iPhone SE

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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[SBiOSoftWhare]

LGTM

[github-actions]

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[codecov-commenter]

Codecov Report

Merging #6525 (59b0790) into develop (c9e916b) will increase coverage by 0.04%.
The diff coverage is 21.42%.

@@             Coverage Diff             @@
##           develop    #6525      +/-   ##
===========================================
+ Coverage     6.20%    6.24%   +0.04%     
===========================================
  Files         1462     1462              
  Lines       157168   157174       +6     
  Branches     63166    63167       +1     
===========================================
+ Hits          9745     9815      +70     
+ Misses      147014   146949      -65     
- Partials       409      410       +1     

Impacted Files	Coverage Δ
...ules/Room/Attachements/AttachmentsViewController.m	0.00% <0.00%> (ø)
...s/Room/Attachements/MXKAttachmentsViewController.m	0.00% <0.00%> (ø)
...iewControllerWithBannerWrapperViewController.swift	46.91% <100.00%> (+2.04%)	⬆️
...rs/EncryptionKeyManager/EncryptionKeyManager.swift	35.41% <0.00%> (-4.17%)	⬇️
...xKit/Controllers/MXKAuthenticationViewController.m	19.01% <0.00%> (ø)
...SharingViewer/View/LiveLocationSharingViewer.swift
...gViewer/MockStaticLocationViewingScreenState.swift
...cationSharing/View/LocationSharingMarkerView.swift
...haring/View/UserAnnotationCalloutContentView.swift
...Coordinator/StaticLocationViewingCoordinator.swift
... and 78 more

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