Align accessibility IDs with elementX android (#567)

* 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)

---------

Co-authored-by: Stefan Ceriu <stefanc@matrix.org>

ElementX/Sources/Screens/AnalyticsPrompt/View/AnalyticsPrompt.swift

@@ -99,14 +99,12 @@ struct AnalyticsPrompt: View {
                     .font(.element.bodyBold)
             }
             .buttonStyle(.elementAction(.xLarge))
-            .accessibilityIdentifier("enableButton")
             
             Button { context.send(viewAction: .disable) } label: {
                 Text(ElementL10n.actionNotNow)
                     .font(.element.bodyBold)
                     .padding(12)
             }
-            .accessibilityIdentifier("disableButton")
         }
     }
 }