Add OnPrem support twith ROPC authentication flow. Add HTTPS_PROXY support

[janis-veinbergs]

The adal (and msal) doesn't support ROPC flow with confidential client https://learn.microsoft.com/en-us/azure/active-directory/develop/v2-oauth-ropc

As part of not recommending this flow for use, the official SDKs do not support this
flow for confidential clients, those that use a secret or assertion.
You may find that the SDK you wish to use does not allow you to add a secret while using ROPC.

Unfortunately for OnPrem we don't have other client authentication flow available

Anyways, was just experimenting on what authentication flows are available to be configured for OnPrem ADFS and whether adal/msal support any of those scenarios... well, not directly, but issuing our own requests to ADFS this can be get to work.

ADFS Preconfiguration required: https://www.youtube.com/watch?v=26OnuDSOZf4

I don't expect this to be merged/supported/whatever, just happened to experiment on this project.

[gitguardian]

⚠️ GitGuardian has uncovered 2 secrets following the scan of your pull request.

Please consider investigating the findings and remediating the incidents. Failure to do so may lead to compromising the associated services or software components.

🔎 Detected hardcoded secrets in your pull request

GitGuardian id	Secret	Commit	Filename
-	Generic CLI Secret	445e562	src/index.ts	View secret
-	Generic CLI Secret	445e562	src/index.ts	View secret

🛠 Guidelines to remediate hardcoded secrets

1. Understand the implications of revoking this secret by investigating where it is used in your code.
2. Replace and store your secrets safely. Learn here the best practices.
3. Revoke and rotate these secrets.
4. If possible, rewrite git history. Rewriting git history is not a trivial act. You might completely break other contributing developers' workflow and you risk accidentally deleting legitimate data.

To avoid such incidents in the future consider

• following these best practices for managing and storing secrets including API keys and other credentials
• install secret detection on pre-commit to catch secret before it leaves your machine and ease remediation.

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