tsp - upgrade tsp to 1.7

[dolauli]

Description

Mandatory Checklist

• Please choose the target release of Azure PowerShell. (⚠️Target release is a different concept from API readiness. Please click below links for details.)

  • General release
  • Public preview
  • Private preview
  • Engineering build
  • No need for a release

• Check this box to confirm: I have read the Submitting Changes section of CONTRIBUTING.md and reviewed the following information:

• SHOULD update ChangeLog.md file(s) appropriately
  • Update src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md.
    • A snippet outlining the change(s) made in the PR should be written under the ## Upcoming Release header in the past tense.
  • Should not change ChangeLog.md if no new release is required, such as fixing test case only.
• SHOULD regenerate markdown help files if there is cmdlet API change. Instruction
• SHOULD have proper test coverage for changes in pull request.
• SHOULD NOT adjust version of module manually in pull request

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[Copilot]

Pull request overview

This PR upgrades TypeSpec compiler and related tooling dependencies from version 1.5.0 to 1.7.0. TypeSpec is used for code generation in the Azure PowerShell repository. The update affects multiple package families: the core TypeSpec compiler and libraries, Azure-specific TypeSpec tools, and extended TypeSpec features. This is an internal tooling update with no Azure PowerShell release required.

Key Changes:

• Upgrade @typespec/compiler and core @typespec/* packages from 1.5.0 to 1.7.0
• Upgrade @azure-tools/typespec-* packages from 0.61.0 to 0.63.0
• Upgrade @typespec/* extended packages (rest, streams, versioning, xml) from 0.75.0 to 0.77.0