Plugins: Fix catalog permissions for org and server admins (#37504)

* simplify toggle + add link to server admin

* feat(catalog): org admins can configure plugin apps, cannot install/uninstall plugins

* fix(catalog): dont show buttons if user doesn't have install permissions

* feat(catalog): cater for accessing catalog via /plugins and /admin/plugins

* feat(catalog): use location for list links and match.url to define breadcrumb links

* test(catalog): mock isGrafanaAdmin for PluginDetails tests

* test(catalog): preserve default bootdata in PluginDetails mock

* refactor(catalog): move orgAdmin check out of state and make easier to reason with

Co-authored-by: Will Browne <will.browne@grafana.com>

pkg/api/frontendsettings.go

@@ -247,7 +247,7 @@ func (hs *HTTPServer) getFrontendSettingsMap(c *models.ReqContext) (map[string]i
 		"http2Enabled":                     hs.Cfg.Protocol == setting.HTTP2Scheme,
 		"sentry":                           hs.Cfg.Sentry,
 		"pluginCatalogURL":                 hs.Cfg.PluginCatalogURL,
-		"pluginAdminEnabled":               (c.IsGrafanaAdmin || hs.Cfg.PluginAdminExternalManageEnabled) && hs.Cfg.PluginAdminEnabled,
+		"pluginAdminEnabled":               hs.Cfg.PluginAdminEnabled,
 		"pluginAdminExternalManageEnabled": hs.Cfg.PluginAdminEnabled && hs.Cfg.PluginAdminExternalManageEnabled,
 		"expressionsEnabled":               hs.Cfg.ExpressionsEnabled,
 		"awsAllowedAuthProviders":          hs.Cfg.AWSAllowedAuthProviders,