* Rename onboarding and login user/pass accessibility ids.
* Refactor remaining server change accessibility IDs
* Avoid accessibilityIdentifier spreading to all decorations on the textBox.
Required because otherwise there are multiple items tagged with the accessibilityId
which means we can't click on "the" item.
* Move all accessibility identifiers to `AccessibilityIdentifiers.swft`
- use same naming convention on all of them
- remove the unused ones
- fix build errors in integration tests and invalid identifiers (still broken until autodiscovery lands on rosa)
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Co-authored-by: Stefan Ceriu <stefanc@matrix.org>