MM-39058 - invite people to join team and channels (#19849)

* MM-39058-invite-to-team-from-add-channel

* fix tests by validating the memberInvite is not nil

* fix i18n texts

* fix lint problem

* fix translation lines

* fix the data structure

* modify api4-team_local file to match with the expected structure

* fix unit tests, fix translation tests

* remove go routine cause not necesary

* add unit test for invite to team and channel

* remove unnecessary validation

* allow both data structures, simple string array and object with memberInvite struct

* fix texts

* fix linter

* fix problems with graceful invites workflow

* handle error while parsing body

* fix unit tests

* take the address just once

* rename channels to channelIds

* fix unit tests

* add tests and fix local channels invite support

Co-authored-by: Pablo Velez Vidal <pablo.velez@mattermost.com>

app/email/mocks/ServiceInterface.go

@@ -237,6 +237,29 @@ func (_m *ServiceInterface) SendInviteEmails(team *model.Team, senderName string
 	return r0
 }
 
+// SendInviteEmailsToTeamAndChannels provides a mock function with given fields: team, channels, senderName, senderUserId, senderProfileImage, invites, siteURL, reminderData, message, errorWhenNotSent
+func (_m *ServiceInterface) SendInviteEmailsToTeamAndChannels(team *model.Team, channels []*model.Channel, senderName string, senderUserId string, senderProfileImage []byte, invites []string, siteURL string, reminderData *model.TeamInviteReminderData, message string, errorWhenNotSent bool) ([]*model.EmailInviteWithError, error) {
+	ret := _m.Called(team, channels, senderName, senderUserId, senderProfileImage, invites, siteURL, reminderData, message, errorWhenNotSent)
+
+	var r0 []*model.EmailInviteWithError
+	if rf, ok := ret.Get(0).(func(*model.Team, []*model.Channel, string, string, []byte, []string, string, *model.TeamInviteReminderData, string, bool) []*model.EmailInviteWithError); ok {
+		r0 = rf(team, channels, senderName, senderUserId, senderProfileImage, invites, siteURL, reminderData, message, errorWhenNotSent)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]*model.EmailInviteWithError)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(*model.Team, []*model.Channel, string, string, []byte, []string, string, *model.TeamInviteReminderData, string, bool) error); ok {
+		r1 = rf(team, channels, senderName, senderUserId, senderProfileImage, invites, siteURL, reminderData, message, errorWhenNotSent)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // SendLicenseInactivityEmail provides a mock function with given fields: _a0, name, locale, siteURL
 func (_m *ServiceInterface) SendLicenseInactivityEmail(_a0 string, name string, locale string, siteURL string) error {
 	ret := _m.Called(_a0, name, locale, siteURL)