MM-41211: Replaces SessionLength*InDays with SessionLength*InHours. (#19838)

* MM-41211: Replaces SessionLength[Web|Mobile|SSO]InDays with SessionLength[Web|Mobile|SSO]InHours.

* MM-41211: Clear the value of the old config settings.

services/telemetry/telemetry.go

@@ -384,9 +384,9 @@ func (ts *TelemetryService) trackConfig() {
 		"forward_80_to_443":                                       *cfg.ServiceSettings.Forward80To443,
 		"maximum_login_attempts":                                  *cfg.ServiceSettings.MaximumLoginAttempts,
 		"extend_session_length_with_activity":                     *cfg.ServiceSettings.ExtendSessionLengthWithActivity,
-		"session_length_web_in_days":                              *cfg.ServiceSettings.SessionLengthWebInDays,
-		"session_length_mobile_in_days":                           *cfg.ServiceSettings.SessionLengthMobileInDays,
-		"session_length_sso_in_days":                              *cfg.ServiceSettings.SessionLengthSSOInDays,
+		"session_length_web_in_hours":                             *cfg.ServiceSettings.SessionLengthWebInHours,
+		"session_length_mobile_in_hours":                          *cfg.ServiceSettings.SessionLengthMobileInHours,
+		"session_length_sso_in_hours":                             *cfg.ServiceSettings.SessionLengthSSOInHours,
 		"session_cache_in_minutes":                                *cfg.ServiceSettings.SessionCacheInMinutes,
 		"session_idle_timeout_in_minutes":                         *cfg.ServiceSettings.SessionIdleTimeoutInMinutes,
 		"isdefault_site_url":                                      isDefault(*cfg.ServiceSettings.SiteURL, model.ServiceSettingsDefaultSiteURL),