Auth: Passwordless Login Option Using Magic Links (#95436)

* initial passwordless client

* passwordless login page

* Working basic e2e flow

* Add todo comments

* Improve the passwordless login flow

* improved passwordless login, backend for passwordless signup

* add expiration to emails

* update email templates & render username & name fields on signup

* improve email templates

* change login page text while awaiting passwordless code

* fix merge conflicts

* use claims.TypeUser

* add initial passwordless tests

* better error messages

* simplified error name

* remove completed TODOs

* linting & minor test improvements & rename passwordless routes

* more linting fixes

* move code generation to its own func, use locationService to get query params

* fix ampersand in email templates & use passwordless api routes in LoginCtrl

* txt emails more closely match html email copy

* move passwordless auth behind experimental feature toggle

* fix PasswordlessLogin property failing typecheck

* make update-workspace

* user correct placeholder

* Update emails/templates/passwordless_verify_existing_user.txt

Co-authored-by: Dan Cech <dcech@grafana.com>

* Update emails/templates/passwordless_verify_existing_user.mjml

Co-authored-by: Dan Cech <dcech@grafana.com>

* Update emails/templates/passwordless_verify_new_user.txt

Co-authored-by: Dan Cech <dcech@grafana.com>

* Update emails/templates/passwordless_verify_new_user.txt

Co-authored-by: Dan Cech <dcech@grafana.com>

* Update emails/templates/passwordless_verify_new_user.mjml

Co-authored-by: Dan Cech <dcech@grafana.com>

* use &amp; in email templates

* Update emails/templates/passwordless_verify_existing_user.txt

Co-authored-by: Dan Cech <dcech@grafana.com>

* remove IP address validation

* struct for passwordless settings

* revert go.work.sum changes

* mock locationService.getSearch in failing test

---------

Co-authored-by: Mihaly Gyongyosi <mgyongyosi@users.noreply.github.com>
Co-authored-by: Dan Cech <dcech@grafana.com>

pkg/services/featuremgmt/toggles_gen.csv

@@ -213,6 +213,7 @@ azureMonitorDisableLogLimit,GA,@grafana/partner-datasources,false,false,false
 preinstallAutoUpdate,GA,@grafana/plugins-platform-backend,false,false,false
 dashboardSchemaV2,experimental,@grafana/dashboards-squad,false,false,true
 playlistsWatcher,experimental,@grafana/grafana-app-platform-squad,false,true,false
+passwordlessMagicLinkAuthentication,experimental,@grafana/identity-access-team,false,false,false
 exploreMetricsRelatedLogs,experimental,@grafana/observability-metrics,false,false,true
 enableExtensionsAdminPage,experimental,@grafana/plugins-platform-backend,false,true,false
 zipkinBackendMigration,experimental,@grafana/oss-big-tent,false,false,false