Related to #3689

Purpose

What is the context of this pull request? Why is it being done?
The virtual-assistant section of the public documentation is outdated

Changes

Are there any changes that need to be called out as significant or particularly difficult to grasp? (Include illustrative screenshots for context if applicable.)

• Migration from botbuilder-tools to botframework-cli commands
• Remove redundant information
• Fix broken/empty links

The updated documents are the followings:

• docs/_docs/virtual-assistant/handbook/activity-flow.md
• docs/_docs/virtual-assistant/handbook/deployment-scripts.md
• docs/_docs/virtual-assistant/handbook/devops.md
• docs/_docs/virtual-assistant/handbook/localization.md
• docs/_docs/virtual-assistant/tutorials/create-assistant/csharp/3-create-project.md
• docs/_docs/virtual-assistant/tutorials/create-assistant/csharp/4-provision-your-azure-resources.md
• docs/_docs/virtual-assistant/tutorials/create-assistant/typescript/3-create-project.md
• docs/_docs/virtual-assistant/tutorials/create-assistant/typescript/4-provision-you-azure-resources.md
• docs/_docs/virtual-assistant/tutorials/customize-assistant/csharp/2-edit-your-greeting.md
• docs/_docs/virtual-assistant/tutorials/customize-assistant/csharp/3-edit-responses.md
• docs/_docs/virtual-assistant/tutorials/customize-assistant/csharp/4-edit-your-cognitive-models.md
• docs/_docs/virtual-assistant/tutorials/customize-assistant/typescript/2-edit-your-greeting.md
• docs/_docs/virtual-assistant/tutorials/customize-assistant/typescript/3-edit-responses.md
• docs/_docs/virtual-assistant/tutorials/customize-assistant/typescript/4-edit-your-cognitive-models.md
• docs/_docs/virtual-assistant/tutorials/deploy-assistant/cli/1-intro.md
• docs/_docs/virtual-assistant/tutorials/deploy-assistant/cli/4-update-application-settings.md
• docs/_docs/virtual-assistant/tutorials/deploy-assistant/cli/5-deploy-luis-models.md
• docs/_docs/virtual-assistant/tutorials/deploy-assistant/cli/7-create-dispatch-model.md
• docs/_docs/virtual-assistant/tutorials/deploy-assistant/web/1-intro.md
• docs/_docs/virtual-assistant/tutorials/deploy-assistant/web/4-update-application-settings.md
• docs/_docs/virtual-assistant/tutorials/deploy-assistant/web/7-create-dispatch-model.md

Tests

Is this covered by existing tests or new ones? If no, why not?
It was rendered manually in order to check the result of the changes

Feature Plan

Are there any remaining steps or dependencies before this issue can be fully resolved? If so, describe and link to any relevant pull requests or issues.

Checklist

General

• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the appropriate tests
• I have updated related documentation