Use ASWebAuthenticationSession to display OIDC account management URL

[hughns]

Fixes #7668

Pull Request Checklist

• [ ] I read the contributing guide
• [ ] UI change has been tested on both light and dark themes, in portrait and landscape orientations and on iPhone and iPad simulators
• [ ] Accessibility has been taken into account.
• [x] Pull request is based on the develop branch
• [x] Pull request contains a changelog file in ./changelog.d
• [x] You've made a self review of your PR
• [ ] Pull request includes screenshots or videos of UI changes
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[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: +0.36% :tada:

Comparison is base (5cbd1df) 11.85% compared to head (a31327b) 12.22%. Report is 11 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #7671 +/- ## =========================================== + Coverage 11.85% 12.22% +0.36% =========================================== Files 1648 1650 +2 Lines 163748 163832 +84 Branches 67186 67241 +55 =========================================== + Hits 19412 20021 +609 + Misses 143698 143165 -533 - Partials 638 646 +8 ``` | [Flag](https://app.codecov.io/gh/vector-im/element-ios/pull/7671/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vector-im) | Coverage Δ | | |---|---|---| | [uitests](https://app.codecov.io/gh/vector-im/element-ios/pull/7671/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vector-im) | `54.96% <ø> (-0.09%)` | :arrow_down: | | [unittests](https://app.codecov.io/gh/vector-im/element-ios/pull/7671/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vector-im) | `6.07% <0.00%> (+0.36%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vector-im#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files Changed](https://app.codecov.io/gh/vector-im/element-ios/pull/7671?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vector-im) | Coverage Δ | | |---|---|---| | [...Modules/Authentication/SSO/SSOAccountService.swift](https://app.codecov.io/gh/vector-im/element-ios/pull/7671?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vector-im#diff-UmlvdC9Nb2R1bGVzL0F1dGhlbnRpY2F0aW9uL1NTTy9TU09BY2NvdW50U2VydmljZS5zd2lmdA==) | `0.00% <0.00%> (ø)` | | | [...uthentication/SSO/SSOAuthenticationPresenter.swift](https://app.codecov.io/gh/vector-im/element-ios/pull/7671?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vector-im#diff-UmlvdC9Nb2R1bGVzL0F1dGhlbnRpY2F0aW9uL1NTTy9TU09BdXRoZW50aWNhdGlvblByZXNlbnRlci5zd2lmdA==) | `0.00% <0.00%> (ø)` | | | [.../Authentication/SSO/SSOAuthenticationService.swift](https://app.codecov.io/gh/vector-im/element-ios/pull/7671?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vector-im#diff-UmlvdC9Nb2R1bGVzL0F1dGhlbnRpY2F0aW9uL1NTTy9TU09BdXRoZW50aWNhdGlvblNlcnZpY2Uuc3dpZnQ=) | `0.00% <ø> (ø)` | | | [...curity/ManageSession/ManageSessionViewController.m](https://app.codecov.io/gh/vector-im/element-ios/pull/7671?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vector-im#diff-UmlvdC9Nb2R1bGVzL1NldHRpbmdzL1NlY3VyaXR5L01hbmFnZVNlc3Npb24vTWFuYWdlU2Vzc2lvblZpZXdDb250cm9sbGVyLm0=) | `0.00% <0.00%> (ø)` | | | [Riot/Modules/Settings/SettingsViewController.m](https://app.codecov.io/gh/vector-im/element-ios/pull/7671?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vector-im#diff-UmlvdC9Nb2R1bGVzL1NldHRpbmdzL1NldHRpbmdzVmlld0NvbnRyb2xsZXIubQ==) | `0.00% <0.00%> (ø)` | | | [...ions/Coordinator/UserSessionsFlowCoordinator.swift](https://app.codecov.io/gh/vector-im/element-ios/pull/7671?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vector-im#diff-UmlvdFN3aWZ0VUkvTW9kdWxlcy9Vc2VyU2Vzc2lvbnMvQ29vcmRpbmF0b3IvVXNlclNlc3Npb25zRmxvd0Nvb3JkaW5hdG9yLnN3aWZ0) | `0.00% <0.00%> (ø)` | | ... and [13 files with indirect coverage changes](https://app.codecov.io/gh/vector-im/element-ios/pull/7671/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vector-im)

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[pixlwave]

@hughns I added an extra commit that uses the existing SSOAuthenticationPresenter so we have consistency between auth and account on iOS 14 too. (iOS 14 uses a SFSafariViewController during login due to a bug with guided access).