chore(deps): remove Microsoft.Extensions.Hosting package references

[vmelamed]

Summary

Commits

• chore(deps): remove Microsoft.Extensions.Hosting package references

Checklist

• Commit messages follow Conventional Commits format
• Tests pass locally, and cover new code and edge cases. Test coverage is above 80%.
• It is not expected that the performance will degrade by more than 20%
• Documentation is updated if necessary

[Copilot]

Pull request overview

This PR removes the unused Microsoft.Extensions.Hosting dependency from the shared package configuration and updates the TestUtilities lock file accordingly.

Changes:

• Removed the shared Microsoft.Extensions.Hosting package reference.
• Removed the central package version entry for Microsoft.Extensions.Hosting.
• Updated src/TestUtilities/packages.lock.json to drop the direct package and its now-unused transitive dependencies.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
Directory.Build.props	Removes Microsoft.Extensions.Hosting from common package references.
Directory.Packages.props	Removes the central version entry for Microsoft.Extensions.Hosting.
src/TestUtilities/packages.lock.json	Updates locked dependencies after removing hosting.