Service environment (#23443)

* fix fileutils.TestFindFile on MacOS

* introduce model.ExternalServiceEnvironment

* pick license public key from external service env

* pick Stripe public key from external service env

* pick Rudder key from external service env

* configure Sentry DSN from external service env

* always log external_service_environment, Unsetenv

* clear faked BuildEnv, improve logging

* strip out unset GOTAGS

* fix Sentry tests

* simplify to just ServiceEnvironment

* relocate ServiceEnvironment in client config

* initialize CWS URLs based on service environment

* unset rudder key for boards dev

* harden service environment to avoid accidental production

* fix TestSentry again

* fix DEFAULT -> ENTERPRISE

* s/dev/test when naming playbooks rudder key

* simplify boards rudder key switch

* use uniform rudderKey variable names

* retain compatibility with existing pipeline

* reduce to just production/test

* unit test with valid test license

* simplify Playbooks telemetry initialization

* restore dev service environment

* emit ServiceEnvironment when running e2e tests

webapp/channels/webpack.config.js

@@ -410,20 +410,14 @@ if (DEV) {
     config.devtool = 'source-map';
 }
 
-const env = {
-    STRIPE_PUBLIC_KEY: JSON.stringify(process.env.STRIPE_PUBLIC_KEY || ''),
-};
+const env = {};
 if (DEV) {
     env.PUBLIC_PATH = JSON.stringify(publicPath);
-    env.RUDDER_KEY = JSON.stringify(process.env.RUDDER_KEY || '');
-    env.RUDDER_DATAPLANE_URL = JSON.stringify(process.env.RUDDER_DATAPLANE_URL || '');
     if (process.env.MM_LIVE_RELOAD) {
         config.plugins.push(new LiveReloadPlugin());
     }
 } else {
     env.NODE_ENV = JSON.stringify('production');
-    env.RUDDER_KEY = JSON.stringify(process.env.RUDDER_KEY || '');
-    env.RUDDER_DATAPLANE_URL = JSON.stringify(process.env.RUDDER_DATAPLANE_URL || '');
 }
 
 config.plugins.push(new webpack.DefinePlugin({