[MM-47384] Make OpenID Connect free for all (#21556)

* wip: make OpenID Connect free-for-all

* Deprecation note: GoogleOAuth, Office365OAuth

* Improve deprecation comments

Co-authored-by: Martin Kraft <martin@upspin.org>

* Lint fix

* Add model/oauthproviders, move google, openid, office365 from enterprise

* Vet fixes

* Remove redundant log

Co-authored-by: Martin Kraft <martin@upspin.org>
Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

config/client.go

@@ -298,11 +298,11 @@ func GenerateLimitedClientConfig(c *model.Config, telemetryID string, license *m
 	props["SamlLoginButtonColor"] = ""
 	props["SamlLoginButtonBorderColor"] = ""
 	props["SamlLoginButtonTextColor"] = ""
-	props["EnableSignUpWithGoogle"] = "false"
-	props["EnableSignUpWithOffice365"] = "false"
-	props["EnableSignUpWithOpenId"] = "false"
-	props["OpenIdButtonText"] = ""
-	props["OpenIdButtonColor"] = ""
+	props["EnableSignUpWithOpenId"] = strconv.FormatBool(*c.OpenIdSettings.Enable)
+	props["OpenIdButtonColor"] = *c.OpenIdSettings.ButtonColor
+	props["OpenIdButtonText"] = *c.OpenIdSettings.ButtonText
+	props["EnableSignUpWithGoogle"] = strconv.FormatBool(*c.GoogleSettings.Enable)
+	props["EnableSignUpWithOffice365"] = strconv.FormatBool(*c.Office365Settings.Enable)
 	props["CWSURL"] = ""
 	props["EnableCustomBrand"] = strconv.FormatBool(*c.TeamSettings.EnableCustomBrand)
 	props["CustomBrandText"] = *c.TeamSettings.CustomBrandText
@@ -329,20 +329,6 @@ func GenerateLimitedClientConfig(c *model.Config, telemetryID string, license *m
 			props["SamlLoginButtonTextColor"] = *c.SamlSettings.LoginButtonTextColor
 		}
 
-		if *license.Features.GoogleOAuth {
-			props["EnableSignUpWithGoogle"] = strconv.FormatBool(*c.GoogleSettings.Enable)
-		}
-
-		if *license.Features.Office365OAuth {
-			props["EnableSignUpWithOffice365"] = strconv.FormatBool(*c.Office365Settings.Enable)
-		}
-
-		if *license.Features.OpenId {
-			props["EnableSignUpWithOpenId"] = strconv.FormatBool(*c.OpenIdSettings.Enable)
-			props["OpenIdButtonColor"] = *c.OpenIdSettings.ButtonColor
-			props["OpenIdButtonText"] = *c.OpenIdSettings.ButtonText
-		}
-
 		if *license.Features.CustomTermsOfService {
 			props["EnableCustomTermsOfService"] = strconv.FormatBool(*c.SupportSettings.CustomTermsOfServiceEnabled)
 			props["CustomTermsOfServiceReAcceptancePeriod"] = strconv.FormatInt(int64(*c.SupportSettings.CustomTermsOfServiceReAcceptancePeriod), 10)