Integrate Support for Short-Lived Tokens (STS) in Remote Authentication

[guy-har]

Description

Objective: Extend lakeFS's remote authentication to include support for Short-Lived Tokens (STS), enhancing security and user convenience.

Current Mechanism: lakeFS authenticates users remotely by validating username and password against an identity provider, as detailed here.

Proposed Feature: Allow users to authenticate using STS credentials (state, code, redirect-uri) rather than traditional credentials. lakeFS will forward these to the remote authenticator, which will validate and return claims to lakeFS. lakeFS then verifies these claims and issues a token for the user.