Migrate Tasks to Node 16

[Pranshu-Negi]

Reviewers and contributors, please follow the migration to node16 guide we have for in-the-box ADO tasks:
https://github.com/microsoft/azure-pipelines-tasks/blob/master/docs/migrateNode16.md

This PR is not ready to be merged, it is just a starting point to help contributors start.

The Node 16 migration guide is created keeping in mind that the in-the-box ADO tasks were already migrated to Node 10. In order to ensure smooth migration to Node 16, we need to ensure that the task can be run using a Node 10 handler as well. Please refer to the following guide for the same:
https://github.com/microsoft/azure-pipelines-tasks/blob/master/docs/migrateNode10.md

Since vso-task-lib is deprecated, it should be replaced by azure-pipelines-task-lib. Since I couldn't find any package.json for the task, I have also pushed the node modules for azure-pipelines-task-lib to the branch.

Please be sure to retest all tasks on node 10 and16 thoroughly