[WIP] [MM-55031] OAuth Outgoing Connection App integration (#25379)

* OAuthOutgoingConnection model

* added store

* make generated

* add missing license headers

* fix receiver name

* i18n

* i18n sorting

* update migrations from master

* make migrations-extract

* update retrylayer tests

* replaced sql query with id pagination

* fixed flaky tests

* missing columns

* missing columns on save/update

* typo

* improved tests

* remove enum from mysql colum

* add password credentials to store

* license changes

* OAuthOutgoingConnectionInterface

* Oauth -> OAuth

* make generated

* merge migrations

* renamed migrations

* model change suggestions

* refactor test functionsn

* migration typo

* refactor store table names

* updated sanitize test

* cleanup merge

* refactor symbol

* list endpoint

* oauthoutgoingconnection -> outgoingoauthconnection

* signature change

* i18n update

* granttype typo

* naming

* api list

* uppercase typo

* i18n

* missing license header

* fixed path in comments

* updated openapi definitions

* sanitize connections

* make generated

* test license and no feature flag

* removed t.fatal

* updated testhelper calls

* yaml schema fixes

* switched interface name

* suggested translation

* missing i18n translation

* address comments

* updated i18n

server/public/model/outgoing_oauth_connection.go

@@ -27,8 +27,8 @@ type OutgoingOAuthConnection struct {
 	CreateAt            int64                            `json:"create_at"`
 	UpdateAt            int64                            `json:"update_at"`
 	Name                string                           `json:"name"`
-	ClientId            string                           `json:"client_id"`
-	ClientSecret        string                           `json:"client_secret"`
+	ClientId            string                           `json:"client_id,omitempty"`
+	ClientSecret        string                           `json:"client_secret,omitempty"`
 	CredentialsUsername *string                          `json:"credentials_username,omitempty"`
 	CredentialsPassword *string                          `json:"credentials_password,omitempty"`
 	OAuthTokenURL       string                           `json:"oauth_token_url"`
@@ -47,6 +47,14 @@ func (oa *OutgoingOAuthConnection) Auditable() map[string]interface{} {
 	}
 }
 
+// Sanitize removes any sensitive fields from the OutgoingOAuthConnection object.
+func (oa *OutgoingOAuthConnection) Sanitize() {
+	oa.ClientId = ""
+	oa.ClientSecret = ""
+	oa.CredentialsUsername = nil
+	oa.CredentialsPassword = nil
+}
+
 // IsValid validates the object and returns an error if it isn't properly configured
 func (oa *OutgoingOAuthConnection) IsValid() *AppError {
 	if !IsValidId(oa.Id) {
@@ -65,19 +73,19 @@ func (oa *OutgoingOAuthConnection) IsValid() *AppError {
 		return NewAppError("OutgoingOAuthConnection.IsValid", "model.outgoing_oauth_connection.is_valid.creator_id.error", nil, "id="+oa.Id, http.StatusBadRequest)
 	}
 
-	if utf8.RuneCountInString(oa.Name) > 64 {
+	if oa.Name == "" || utf8.RuneCountInString(oa.Name) > 64 {
 		return NewAppError("OutgoingOAuthConnection.IsValid", "model.outgoing_oauth_connection.is_valid.name.error", nil, "id="+oa.Id, http.StatusBadRequest)
 	}
 
-	if len(oa.ClientId) == 0 || utf8.RuneCountInString(oa.ClientId) > 255 {
+	if oa.ClientId == "" || utf8.RuneCountInString(oa.ClientId) > 255 {
 		return NewAppError("OutgoingOAuthConnection.IsValid", "model.outgoing_oauth_connection.is_valid.client_id.error", nil, "id="+oa.Id, http.StatusBadRequest)
 	}
 
-	if len(oa.ClientSecret) == 0 || utf8.RuneCountInString(oa.ClientSecret) > 255 {
+	if oa.ClientSecret == "" || utf8.RuneCountInString(oa.ClientSecret) > 255 {
 		return NewAppError("OutgoingOAuthConnection.IsValid", "model.outgoing_oauth_connection.is_valid.client_secret.error", nil, "id="+oa.Id, http.StatusBadRequest)
 	}
 
-	if len(oa.OAuthTokenURL) == 0 || utf8.RuneCountInString(oa.OAuthTokenURL) > 256 {
+	if oa.OAuthTokenURL == "" || utf8.RuneCountInString(oa.OAuthTokenURL) > 256 {
 		return NewAppError("OutgoingOAuthConnection.IsValid", "model.outgoing_oauth_connection.is_valid.oauth_token_url.error", nil, "id="+oa.Id, http.StatusBadRequest)
 	}
 
@@ -137,13 +145,6 @@ func (oa *OutgoingOAuthConnection) Etag() string {
 	return Etag(oa.Id, oa.UpdateAt)
 }
 
-// Sanitize removes any sensitive fields from the OutgoingOAuthConnection object.
-func (oa *OutgoingOAuthConnection) Sanitize() {
-	oa.ClientSecret = ""
-	oa.CredentialsUsername = nil
-	oa.CredentialsPassword = nil
-}
-
 // OutgoingOAuthConnectionGetConnectionsFilter is used to filter outgoing connections
 type OutgoingOAuthConnectionGetConnectionsFilter struct {
 	OffsetId string