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

server/config/client.go

@@ -234,6 +234,7 @@ func GenerateLimitedClientConfig(c *model.Config, telemetryID string, license *m
 	props["BuildHash"] = model.BuildHash
 	props["BuildHashEnterprise"] = model.BuildHashEnterprise
 	props["BuildEnterpriseReady"] = model.BuildEnterpriseReady
+	props["ServiceEnvironment"] = model.GetServiceEnvironment()
 
 	props["EnableBotAccountCreation"] = strconv.FormatBool(*c.ServiceSettings.EnableBotAccountCreation)
 	props["EnableFile"] = strconv.FormatBool(*c.LogSettings.EnableFile)