(DOCSP-37946): Swift: Drop support for Xcode 14 (#3240)

## Pull Request Info

Jira ticket: https://jira.mongodb.org/browse/DOCSP-37946

-
[Install](https://preview-mongodbdacharyc.gatsbyjs.io/realm/DOCSP-37946/sdk/swift/install/):
Drop Xcode 14 support. Refactor minimum OS and Xcode requirements to
remove duplicate information.

### Reminder Checklist

Before merging your PR, make sure to check a few things.

- [x] Did you tag pages appropriately?
  - genre
  - meta.keywords
  - meta.description
- [x] Describe your PR's changes in the Release Notes section
- [x] Create a Jira ticket for related docs-app-services work, if any

### Release Notes

- **Swift SDK**
- Install: Drop Xcode 14 support. Refactor minimum OS and Xcode
requirements to remove duplicate information.

### Review Guidelines


[REVIEWING.md](https://github.com/mongodb/docs-realm/blob/master/REVIEWING.md)

Author: dacharyc

source/sdk/swift/install.txt

@@ -31,26 +31,13 @@ Prerequisites
 Before getting started, ensure your development environment
 meets the following prerequisites:
 
-- Xcode 14.1-14.3.1 with a target of iOS 11.0 or higher, macOS 10.13 or higher, tvOS 11.0 or higher, or watchOS 4.0 or higher.
+- Your project uses an Xcode version and minimum OS version listed in the
+  :ref:`swift-os-support` section of this page.
 - Reflection is enabled in your project. The Swift SDK uses reflection to 
   determine your model's properties. Your project must not set 
   ``SWIFT_REFLECTION_METADATA_LEVEL = none``, or the SDK cannot see properties 
   in your model. Reflection is enabled by default if your project does 
-  not specifically set a level for this setting. 
-
-.. versionchanged:: 10.40.0
-
-Swift SDK version 10.40.0 drops support for Xcode 13. For v10.39.01 and earlier,
-these Xcode 13 requirements apply:
-
-- `Xcode <https://developer.apple.com/xcode/>`__ version 13.1 or higher.
-- When using Xcode 13, a target of iOS 9.0 or higher, macOS 10.9 or higher, tvOS 9.0 or higher, or watchOS 2.0 or higher.
-- If using Swift Package Manager with Xcode 13, target of iOS 11+ or macOS 10.10+ is required.
-
-.. note::
-
-   There are special considerations when using the SDK with
-   tvOS. See :ref:`ios-tvos` for more information.
+  not specifically set a level for this setting.
 
 Installation
 ------------
@@ -359,38 +346,11 @@ OS Support
    There are special considerations when using the SDK with
    tvOS. See :ref:`ios-tvos` for more information.
 
-Xcode 14
-~~~~~~~~
-
-.. list-table::
-   :header-rows: 1
-   :stub-columns: 1
-   :class: index-table
-
-   * - Supported OS
-     - Realm
-     - Atlas App Services
-
-   * - iOS 11.0+
-     - X
-     - X
-
-   * - macOS 10.13+
-     - X
-     - X
-
-   * - tvOS 11.0+
-     - X
-     - X
-
-   * - watchOS 4.0+
-     - X
-     - 
-
 Xcode 15
 ~~~~~~~~
 
-.. versionadded:: 10.40.1
+.. versionchanged:: 10.50.0
+   Minimum required Xcode version is 15.1
 
 .. list-table::
    :header-rows: 1
@@ -405,11 +365,11 @@ Xcode 15
      - X
      - X
 
-   * - macOS 10.13+
+   * - macOS 10.14+
      - X
      - X
 
-   * - tvOS 11.0+
+   * - tvOS 12.0+
      - X
      - X
 
@@ -421,6 +381,18 @@ Xcode 15
      - X
      - X
 
+Xcode 14
+~~~~~~~~
+
+.. versionchanged:: 10.50.0
+   Removed support for Xcode 14.
+
+Swift SDK version 10.50.0 drops support for Xcode 14. For v10.49.3 and earlier,
+these Xcode 14 requirements apply:
+
+- `Xcode <https://developer.apple.com/xcode/>`__ version 14.1 or higher.
+- When using Xcode 14, a target of iOS 11.0 or higher, macOS 10.13 or higher, tvOS 11.0 or higher, or watchOS 4.0 or higher.
+
 Swift Concurrency Support
 -------------------------