[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/api4/channel_bookmark_test.go

@@ -7,7 +7,6 @@ import (
 	"context"
 	"encoding/json"
 	"net/http"
-	"os"
 	"testing"
 	"time"
 
@@ -16,9 +15,7 @@ import (
 )
 
 func TestCreateChannelBookmark(t *testing.T) {
-	os.Setenv("MM_FEATUREFLAGS_ChannelBookmarks", "true")
-	defer os.Unsetenv("MM_FEATUREFLAGS_ChannelBookmarks")
-
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 	err := th.App.SetPhase2PermissionsMigrationStatus(true)
@@ -280,9 +277,7 @@ func TestCreateChannelBookmark(t *testing.T) {
 }
 
 func TestEditChannelBookmark(t *testing.T) {
-	os.Setenv("MM_FEATUREFLAGS_ChannelBookmarks", "true")
-	defer os.Unsetenv("MM_FEATUREFLAGS_ChannelBookmarks")
-
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 	err := th.App.SetPhase2PermissionsMigrationStatus(true)
@@ -690,9 +685,7 @@ func TestEditChannelBookmark(t *testing.T) {
 }
 
 func TestUpdateChannelBookmarkSortOrder(t *testing.T) {
-	os.Setenv("MM_FEATUREFLAGS_ChannelBookmarks", "true")
-	defer os.Unsetenv("MM_FEATUREFLAGS_ChannelBookmarks")
-
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 	err := th.App.SetPhase2PermissionsMigrationStatus(true)
@@ -1102,9 +1095,7 @@ func TestUpdateChannelBookmarkSortOrder(t *testing.T) {
 }
 
 func TestDeleteChannelBookmark(t *testing.T) {
-	os.Setenv("MM_FEATUREFLAGS_ChannelBookmarks", "true")
-	defer os.Unsetenv("MM_FEATUREFLAGS_ChannelBookmarks")
-
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 	err := th.App.SetPhase2PermissionsMigrationStatus(true)
@@ -1461,9 +1452,7 @@ func TestDeleteChannelBookmark(t *testing.T) {
 }
 
 func TestListChannelBookmarksForChannel(t *testing.T) {
-	os.Setenv("MM_FEATUREFLAGS_ChannelBookmarks", "true")
-	defer os.Unsetenv("MM_FEATUREFLAGS_ChannelBookmarks")
-
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 	err := th.App.SetPhase2PermissionsMigrationStatus(true)