TS Changes for atk.basic in azure and atk.oauth

[MehakBindra]

skip-test-verification

1. Oauth in Typescript - verified in local and dev
2. Basic in typescript Dev env (switched from managed identity back to client id and secret - single tenant)
   For managed identity we would have had to update each template to use azure identity
3. Remove conversion of port to number as ports are strings in dev env

[heyitsaamir]

With this change, we also need to create a Service Principal for the target tenant. As such, the app becomes unusable, unless the user manually does this. ATK has this slated for next week, so we shouldn't do the single-tenant switch just yet.

[heyitsaamir]

Tested TS, and PY.
For posterity's sake, we decided to go with this approach because:

1. Local echo bot works as before
2. Oauth and Dev require service principals to be created. Right now, we are going to make documentation changes to let users do this on Azure portal, but ATK is going to add this as part of their CLI next(ish) week.