(DOCSP-39162): Swift: Change baseURL during runtime

[dacharyc]

Pull Request Info

Jira ticket: https://jira.mongodb.org/browse/DOCSP-39162

• Connect to an App Services App: New "Connect to a Specific Server" section with baseURL info. New "Connect to a Different Server During Runtime" subsection with info about the new experimental API.

Note for reviewer: the failing test is related to the MongoClient API. One operation is failing with a timeout. It all passes locally, so I'm inclined to think this is CI latency issues and we can disregard this failure.

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
  • Application Services/Connect to an App Services App: New "Connect to a Specific Server" section with baseURL info. New "Connect to a Different Server During Runtime" subsection with info about the new experimental API.

Review Guidelines

REVIEWING.md

[github-actions[bot]]

Readability for Commit Hash: ec5c3711b1ddbde4a13dd2d370778a18e557186f

You can see any previous Readability scores (if they exist) by looking at the comment's history.

Readability scores for changed documents:

• source/sdk/swift/app-services/connect-to-app-services-backend: Grade Level: 8.0, Reading Ease: 64.61
• source/sdk/swift/sync/sync-session: Grade Level: 8.5, Reading Ease: 57.87

For Grade Level, aim for 8 or below.

For Reading Ease scores, aim for 60 or above:

Score	Difficulty
90-100	Very Easy
80-89	Easy
70-79	Fairly Easy
60-69	Medium
50-59	Fairly Hard
30-49	Hard
0-29	Very Hard

For help improving readability, try Hemingway App.

[docs-builder-bot]

✨ Staging URL: https://preview-mongodbmongodb.gatsbyjs.io/realm/master/

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