Updates the "Orchestrate Python apps in Aspire" tutorial.

[alistairmatthews]

Summary

Updates the Python tutorial:

• Uses the Aspire CLI where possible.
• Updates screenshots where necessary.
• Other updates.

Fixes #5346

---

Internal previews

📄 File	🔗 Preview link
docs/get-started/build-aspire-apps-with-python.md	Orchestrate Python apps in Aspire

[alistairmatthews]

Note: After you add the telemetry to the Python app, you must use the .NET CLI to run the AppHost, and not the Aspire CLI, because you have to specify the http launch profile. I don't think the Aspire CLI currently supports this.

[Copilot]

Pull Request Overview

This PR updates the "Orchestrate Python apps in Aspire" tutorial to modernize the instructions by utilizing the Aspire CLI instead of dotnet commands, updates screenshots to reflect current UI, and makes other minor improvements to the tutorial content.

Key changes:

• Replaces dotnet CLI commands with aspire CLI commands for creating and running projects
• Adds prerequisite about installing the Aspire CLI
• Updates UI terminology from "Endpoints" to "URLs" to match current dashboard

[alistairmatthews]

Closing this PR because it's all in #5304