Source available metrics (#24879)

* Expose metrics under a source available license

* do not assume Cluster()

* allow metrics if licensed or dev

* temporary vet override

* simplify BULID_TAGS handling

* auto clean old imports.go

* fix license listener

* e2e test metrics & license semantics

* update from enterprise

* switch back to mattermost-govet/v2@new now

* update metrics from upstream

* Update license_spec.js

Co-authored-by: Saturnino Abril <saturnino.abril@gmail.com>

* Update license_spec.js

Co-authored-by: Saturnino Abril <saturnino.abril@gmail.com>

* Update e2e-tests/cypress/tests/integration/channels/enterprise/metrics/license_spec.js

Co-authored-by: Saturnino Abril <saturnino.abril@gmail.com>

* Update e2e-tests/cypress/tests/integration/channels/enterprise/metrics/license_spec.js

* split up specs

* require/delete license earlier in e2e test

* expanded expect to debug failures

* more logging

* Revert "more logging"

This reverts commit 0bc513fd926c07a0c6050f4b4c742e856d8dc435.

* e2e: try deleting license first

* update from enterprise

* toggleMetricsOn to work around license delete

* eslint

* ensure admin before deleting license

* update from enterprise

* updates from enterprise

* fix cypress logging

* temp: log at DEBUG for Cypress tests

---------

Co-authored-by: Saturnino Abril <saturnino.abril@gmail.com>
Co-authored-by: Mattermost Build <build@mattermost.com>

server/.gitignore

@@ -21,9 +21,6 @@ config/active.dat
 config/logging.json
 /plugins
 
-# Enterprise & products imports files
-channels/imports/imports.go
-
 # go.work file
 go.work
 go.work.sum
@@ -104,8 +101,6 @@ api/data/*
 api4/data/*
 app/data/*
 
-/enterprise
-
 cover.out
 ecover.out
 mmctlcover.out