Let the platform decide where to take the user

[CodeWithEmad]

Hi.
I don't think that this is not a big issue but we should let the platform decide where to take the user since we can change the login. I believe checking for should_redirect_to_authn_mfe is happening in the edx-platform and there's no need for that

tutor-indigo/tutorindigo/templates/indigo/lms/templates/header/navbar-not-authenticated.html

Lines 52 to 70 in 1dc3c5c

	% if should_redirect_to_authn_mfe:
	<div class="mobile-nav-item hidden-mobile nav-item">
	<a class="register-btn btn" href="${settings.AUTHN_MICROFRONTEND_URL}/register${login_query()}">${_("Register for free")}</a>
	</div>
	% else:
	<div class="mobile-nav-item hidden-mobile nav-item">
	<a class="register-btn btn" href="/register${login_query()}">${_("Register for free")}</a>
	</div>
	% endif
	% endif
	% if should_redirect_to_authn_mfe:
	<div class="mobile-nav-item hidden-mobile nav-item">
	<a class="sign-in-btn btn" href="${settings.AUTHN_MICROFRONTEND_URL}/login${login_query()}">${_("Sign in")}</a>
	</div>
	% else:
	<div class="mobile-nav-item hidden-mobile nav-item">
	<a class="sign-in-btn btn" href="/login${login_query()}">${_("Sign in")}</a>
	</div>
	% endif

for example, if you set THIRD_PARTY_AUTH_HINT to your tpa slug, /login will take you to that page, instead of login in authn MFE.