[MM-62408] Server Code Coverage with Fully Parallel Tests (#30078)

* TestPool

* Store infra

* Store tests updates

* Bump maximum concurrent postgres connections

* More infra

* channels/jobs

* channels/app

* channels/api4

* Protect i18n from concurrent access

* Replace some use of os.Setenv

* Remove debug

* Lint fixes

* Fix more linting

* Fix test

* Remove use of Setenv in drafts tests

* Fix flaky TestWebHubCloseConnOnDBFail

* Fix merge

* [MM-62408] Add CI job to generate test coverage (#30284)

* Add CI job to generate test coverage

* Remove use of Setenv in drafts tests

* Fix flaky TestWebHubCloseConnOnDBFail

* Fix more Setenv usage

* Fix more potential flakyness

* Remove parallelism from flaky test

* Remove conflicting env var

* Fix

* Disable parallelism

* Test atomic covermode

* Disable parallelism

* Enable parallelism

* Add upload coverage step

* Fix codecov.yml

* Add codecov.yml

* Remove redundant workspace field

* Add Parallel() util methods and refactor

* Fix formatting

* More formatting fixes

* Fix reporting

server/channels/jobs/server_test.go

@@ -4,6 +4,7 @@
 package jobs
 
 import (
+	"os"
 	"testing"
 	"time"
 
@@ -11,6 +12,10 @@ import (
 )
 
 func TestStartWorkers(t *testing.T) {
+	if os.Getenv("ENABLE_FULLY_PARALLEL_TESTS") == "true" {
+		t.Parallel()
+	}
+
 	t.Run("uninitialized", func(t *testing.T) {
 		jobServer, _, _ := makeJobServer(t)
 		err := jobServer.StartWorkers()
@@ -43,6 +48,10 @@ func TestStartWorkers(t *testing.T) {
 }
 
 func TestStopWorkers(t *testing.T) {
+	if os.Getenv("ENABLE_FULLY_PARALLEL_TESTS") == "true" {
+		t.Parallel()
+	}
+
 	t.Run("uninitialized", func(t *testing.T) {
 		jobServer, _, _ := makeJobServer(t)
 		err := jobServer.StopWorkers()
@@ -69,6 +78,10 @@ func TestStopWorkers(t *testing.T) {
 }
 
 func TestStartSchedulers(t *testing.T) {
+	if os.Getenv("ENABLE_FULLY_PARALLEL_TESTS") == "true" {
+		t.Parallel()
+	}
+
 	t.Run("uninitialized", func(t *testing.T) {
 		jobServer, _, _ := makeJobServer(t)
 		err := jobServer.StartSchedulers()
@@ -99,6 +112,10 @@ func TestStartSchedulers(t *testing.T) {
 }
 
 func TestStopSchedulers(t *testing.T) {
+	if os.Getenv("ENABLE_FULLY_PARALLEL_TESTS") == "true" {
+		t.Parallel()
+	}
+
 	t.Run("uninitialized", func(t *testing.T) {
 		jobServer, _, _ := makeJobServer(t)
 		err := jobServer.StopSchedulers()