Refactor the authentication action to be a common one.

[jannyHou]

Description

Refactor the authentication action to be a common one that could perform authenticate for both non-passport based strategies and passport based strategies.

Acceptance criteria

• Refactor action so that it could perform any strategy's authenticate method, not only passport based ones.
  • The returned strategy should be described using the AuthenticationStrategy interface created in Add abstraction for authentication strategy #2466

[bajtos]

Isn't this a necessary part of #2466: Add abstraction for authentication strategy? I mean what is a new abstraction good for, when it's not used by the authentication action?

[jannyHou]

I was trying to split the abstraction story into separate ones, honestly without working on the code I couldn't say for sure does the auth action have to be refactored together with the auth strategy interface 😞

[emonddr]

May involve the work needed in #2311

[dhmlau]

@emonddr @jannyHou, now that PR #2688 has landed, is this task done?