[MM-48014] Auto-enable Apps Bar by moving EnableAppBar setting to DisableAppBar (#23010)

* auto-enable Apps Bar by moving EnableAppBar setting to DisableAppBar

* update playwright config

* remove EnableAppBar config setting to avoid confusion

* small fixes

---------

Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: Harrison Healey <harrisonmhealey@gmail.com>

e2e-tests/playwright/support/server/default_config.ts

@@ -36,7 +36,7 @@ const onPremServerConfig = (): Partial<TestAdminConfig> => {
             ClusterName: testConfig.haClusterName,
         },
         ExperimentalSettings: {
-            EnableAppBar: true,
+            DisableAppBar: false,
         },
         PasswordSettings: {
             MinimumLength: 5,
@@ -534,7 +534,7 @@ const defaultServerConfig: AdminConfig = {
         UseNewSAMLLibrary: false,
         EnableSharedChannels: false,
         EnableRemoteClusterService: false,
-        EnableAppBar: false,
+        DisableAppBar: true,
         DisableRefetchingOnBrowserFocus: false,
         DelayChannelAutocomplete: false,
     },