[dev-tool] Update migrate-package for ARM packages and update snippets

[mpodwysocki]

Packages impacted by this PR

• @azure/dev-tool
• @azure/arm-voiceservices
• @azure/arm-webpubsub
• @azure/arm-workloads
• @azure/arm-workloadssapvirtualinstance

Issues associated with this PR

• Migrate mgmt pacakge to esm #32184
• [snippets] Add README snippets for all projects #32416

Describe the problem that is addressed by this PR

Updates the migration tool for ARM packages and updates snippets for the above packages.

This adds the following for the migration tool.

• Fixes for samples-dev to add Promise<void> to all non-marked methods
• Change beforeEach and afterEach to use arrow functions instead of function
• Fix the timeout issue on it and it.skip to move it to an options parameter.

What are the possible designs available to address the problem? If there are more than one possible design, why was the one in this PR chosen?

Are there test cases added in this PR? (If not, why?)

Provide a list of related PRs (if any)

Command used to generate this PR:**(Applicable only to SDK release request PRs)

Checklists

• Added impacted package name to the issue description
• Does this PR needs any fixes in the SDK Generator?** (If so, create an Issue in the Autorest/typescript repository and link it here)
• Added a changelog (if necessary)

[azure-sdk]

API change check

API changes are not detected in this pull request.