Fix misspellings and enable misspell on ci (#16285)

Co-authored-by: Ben Schumacher <ben.schumacher@mattermost.com>

app/app_iface.go

@@ -228,7 +228,7 @@ type AppIface interface {
 	// belong to users in the specified team, linking them to their users
 	MentionsToTeamMembers(message, teamId string) model.UserMentionMap
 	// MoveChannel method is prone to data races if someone joins to channel during the move process. However this
-	// function is only exposed to sysadmins and the possibility of this edge case is realtively small.
+	// function is only exposed to sysadmins and the possibility of this edge case is relatively small.
 	MoveChannel(team *model.Team, channel *model.Channel, user *model.User) *model.AppError
 	// NewWebConn returns a new WebConn instance.
 	NewWebConn(ws *websocket.Conn, session model.Session, t goi18n.TranslateFunc, locale string) *WebConn

app/channel.go

@@ -2614,7 +2614,7 @@ func (a *App) RemoveAllDeactivatedMembersFromChannel(channel *model.Channel) *mo
 }
 
 // MoveChannel method is prone to data races if someone joins to channel during the move process. However this
-// function is only exposed to sysadmins and the possibility of this edge case is realtively small.
+// function is only exposed to sysadmins and the possibility of this edge case is relatively small.
 func (a *App) MoveChannel(team *model.Team, channel *model.Channel, user *model.User) *model.AppError {
 	// Check that all channel members are in the destination team.
 	channelMembers, err := a.GetChannelMembersPage(channel.Id, 0, 10000000)

app/license.go

@@ -223,7 +223,7 @@ func (s *Server) GetSanitizedClientLicense() map[string]string {
 	return sanitizedLicense
 }
 
-// RequestTrialLicense request a trial license from the mattermost offical license server
+// RequestTrialLicense request a trial license from the mattermost official license server
 func (s *Server) RequestTrialLicense(trialRequest *model.TrialLicenseRequest) *model.AppError {
 	resp, err := http.Post(requestTrialURL, "application/json", bytes.NewBuffer([]byte(trialRequest.ToJson())))
 	if err != nil {

app/notification_push_test.go

@@ -1252,7 +1252,7 @@ func TestSendAckToPushProxy(t *testing.T) {
 	assert.Equal(t, ack.NotificationType, handler.notificationAcks()[0].NotificationType)
 }
 
-// TestAllPushNotifications is a master test which sends all verious types
+// TestAllPushNotifications is a master test which sends all various types
 // of notifications and verifies they have been properly sent.
 func TestAllPushNotifications(t *testing.T) {
 	if testing.Short() {

app/notification_test.go

@@ -847,7 +847,7 @@ func TestGetExplicitMentions(t *testing.T) {
 				OtherPotentialMentions: nil,
 			},
 		},
-		"matching group with preceeding @": {
+		"matching group with preceding @": {
 			Message: "@engineering",
 			Groups:  map[string]*model.Group{"engineering": {Name: model.NewString("engineering")}},
 			Expected: &ExplicitMentions{
@@ -858,7 +858,7 @@ func TestGetExplicitMentions(t *testing.T) {
 				OtherPotentialMentions: []string{"engineering"},
 			},
 		},
-		"matching upper case group with preceeding @": {
+		"matching upper case group with preceding @": {
 			Message: "@Engineering",
 			Groups:  map[string]*model.Group{"engineering": {Name: model.NewString("engineering")}},
 			Expected: &ExplicitMentions{
@@ -2092,12 +2092,12 @@ func TestAddGroupMention(t *testing.T) {
 			Groups:   map[string]*model.Group{"engineering": {Name: model.NewString("engineering")}, "developers": {Name: model.NewString("developers")}},
 			Expected: false,
 		},
-		"matching group with preceeding @": {
+		"matching group with preceding @": {
 			Word:     "@engineering",
 			Groups:   map[string]*model.Group{"engineering": {Name: model.NewString("engineering")}, "developers": {Name: model.NewString("developers")}},
 			Expected: true,
 		},
-		"matching upper case group with preceeding @": {
+		"matching upper case group with preceding @": {
 			Word:     "@Engineering",
 			Groups:   map[string]*model.Group{"engineering": {Name: model.NewString("engineering")}, "developers": {Name: model.NewString("developers")}},
 			Expected: true,