tpl/tplimpl: Update Google Analytics template and config

Google Analytics 4 (GA4) replaced Google Universal Analytics (UA)
effective 1 July 2023.

See https://support.google.com/analytics/answer/11583528.

Changes:

- Update tpl/tplimpl/embedded/templates/google_analytics.html
- Remove tpl/tplimpl/embedded/templates/google_analytics_async.html
- Remove extraneous config settings

Closes #11802
Closes #10093

config/privacy/privacyConfig.go

@@ -44,15 +44,9 @@ type Disqus struct {
 type GoogleAnalytics struct {
 	Service `mapstructure:",squash"`
 
-	// Enabling this will disable the use of Cookies and use Session Storage to Store the GA Client ID.
-	UseSessionStorage bool
-
 	// Enabling this will make the GA templates respect the
 	// "Do Not Track" HTTP header. See  https://www.paulfurley.com/google-analytics-dnt/.
 	RespectDoNotTrack bool
-
-	// Enabling this will make it so the users' IP addresses are anonymized within Google Analytics.
-	AnonymizeIP bool
 }
 
 // Instagram holds the privacy configuration settings related to the Instagram shortcode.

config/privacy/privacyConfig_test.go

@@ -33,8 +33,6 @@ disable = true
 [privacy.googleAnalytics]
 disable = true
 respectDoNotTrack = true
-anonymizeIP = true
-useSessionStorage = true
 [privacy.instagram]
 disable = true
 simple = true
@@ -60,8 +58,7 @@ simple = true
 
 	got := []bool{
 		pc.Disqus.Disable, pc.GoogleAnalytics.Disable,
-		pc.GoogleAnalytics.RespectDoNotTrack, pc.GoogleAnalytics.AnonymizeIP,
-		pc.GoogleAnalytics.UseSessionStorage, pc.Instagram.Disable,
+		pc.GoogleAnalytics.RespectDoNotTrack, pc.Instagram.Disable,
 		pc.Instagram.Simple, pc.Twitter.Disable, pc.Twitter.EnableDNT,
 		pc.Twitter.Simple, pc.Vimeo.Disable, pc.Vimeo.EnableDNT, pc.Vimeo.Simple,
 		pc.YouTube.PrivacyEnhanced, pc.YouTube.Disable,