MM-55320 - Limit length of browser user agent version; ratelimit the /sessions endpoint (#25900)

* add ratelimit to /sessions; cap userAgent version length; tests

* add MaxSessionsLimit; remove oldest session first; tests

* can't use slices in 1.20; improve test

* nits

* add GetLRUSessions; move limiting to CreateSession; remove rate limiting

* use queryBuilder

* mysql needs a limit when using offset

* update i18n

* refactor into limitNumberOfSessions; protect createSessionForUserAccessToken

* add comment to GetLRUSessions

* add limit to oauth path; PR comments

server/channels/app/user_agent_test.go

@@ -34,6 +34,7 @@ var testUserAgents = []testUserAgent{
 	{"Safari 8", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_4) AppleWebKit/600.7.12 (KHTML, like Gecko) Version/8.0.7 Safari/600.7.12"},
 	{"Safari Mobile", "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B137 Safari/601.1"},
 	{"Mobile App", "Mattermost Mobile/2.7.0+482 (Android; 13; sdk_gphone64_arm64)"},
+	{"Mobile App", "Mattermost Mobile/233.234441.341234223421341234529099823109834440981234+abcdef3214eafeabc3242331129857301afesfffff1930a84e4bd2348fe129ac1309bd929dca3419af934bfe3089fcd (Android; 13; sdk_gphone64_arm64)"},
 }
 
 func TestGetPlatformName(t *testing.T) {
@@ -55,6 +56,7 @@ func TestGetPlatformName(t *testing.T) {
 		"Macintosh",
 		"iPhone",
 		"Linux",
+		"Linux",
 	}
 
 	for i, userAgent := range testUserAgents {
@@ -86,6 +88,7 @@ func TestGetOSName(t *testing.T) {
 		"Mac OS",
 		"iOS",
 		"Android",
+		"Android",
 	}
 
 	for i, userAgent := range testUserAgents {
@@ -117,6 +120,7 @@ func TestGetBrowserName(t *testing.T) {
 		"Safari",
 		"Safari",
 		"Mobile App",
+		"Mobile App",
 	}
 
 	for i, userAgent := range testUserAgents {
@@ -148,6 +152,7 @@ func TestGetBrowserVersion(t *testing.T) {
 		"8.0.7",
 		"9.0",
 		"2.7.0+482",
+		"233.234441.341234223421341234529099823109834440981234+abcdef3214eafeabc3242331129857301afesfffff1930a84e4bd2348fe129ac1309bd929d", // cut off at len 128
 	}
 
 	for i, userAgent := range testUserAgents {