Plugins: Unifying alpha state & options for all plugins (#16530)

* app pages

* app pages

* workign example

* started alpha support

* remove app stuff

* show warning on alpha/beta panels

* put app back on plugin file

* fix go

* add enum for PluginType and PluginIncludeType

* Refactoring and moving settings to plugins section

fixes #16529

conf/defaults.ini

@@ -613,8 +613,13 @@ server_url =
 callback_url =
 
 [panels]
+# here for to support old env variables, can remove after a few months
 enable_alpha = false
 disable_sanitize_html = false
 
+[plugins]
+enable_alpha = false
+app_tls_skip_verify_insecure = false
+
 [enterprise]
 license_path =

conf/sample.ini

@@ -540,7 +540,10 @@ log_queries =
 ;license_path =
 
 [panels]
-;enable_alpha = false
 # If set to true Grafana will allow script tags in text panels. Not recommended as it enable XSS vulnerabilities.
 ;disable_sanitize_html = false
 
+[plugins]
+;enable_alpha = false
+;app_tls_skip_verify_insecure = false
+