[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/notify_admin_test.go

@@ -13,7 +13,9 @@ import (
 )
 
 func TestNotifyAdmin(t *testing.T) {
+	mainHelper.Parallel(t)
 	t.Run("error when notifying with empty data", func(t *testing.T) {
+		mainHelper.Parallel(t)
 		th := Setup(t).InitBasic()
 		defer th.TearDown()
 
@@ -24,6 +26,7 @@ func TestNotifyAdmin(t *testing.T) {
 	})
 
 	t.Run("error when plan is unknown when notifying on upgrade", func(t *testing.T) {
+		mainHelper.Parallel(t)
 		th := Setup(t).InitBasic()
 		defer th.TearDown()
 
@@ -38,6 +41,7 @@ func TestNotifyAdmin(t *testing.T) {
 	})
 
 	t.Run("error when plan is unknown when notifying to trial", func(t *testing.T) {
+		mainHelper.Parallel(t)
 		th := Setup(t).InitBasic()
 		defer th.TearDown()
 
@@ -53,6 +57,7 @@ func TestNotifyAdmin(t *testing.T) {
 	})
 
 	t.Run("error when feature is unknown when notifying on upgrade", func(t *testing.T) {
+		mainHelper.Parallel(t)
 		th := Setup(t).InitBasic()
 		defer th.TearDown()
 
@@ -67,6 +72,7 @@ func TestNotifyAdmin(t *testing.T) {
 	})
 
 	t.Run("error when feature is unknown when notifying to trial", func(t *testing.T) {
+		mainHelper.Parallel(t)
 		th := Setup(t).InitBasic()
 		defer th.TearDown()
 
@@ -82,6 +88,7 @@ func TestNotifyAdmin(t *testing.T) {
 	})
 
 	t.Run("error when user tries to notify again on same feature within the cool off period", func(t *testing.T) {
+		mainHelper.Parallel(t)
 		th := Setup(t).InitBasic()
 		defer th.TearDown()
 
@@ -104,6 +111,7 @@ func TestNotifyAdmin(t *testing.T) {
 	})
 
 	t.Run("successfully save upgrade notification", func(t *testing.T) {
+		mainHelper.Parallel(t)
 		th := Setup(t).InitBasic()
 		defer th.TearDown()
 
@@ -118,7 +126,9 @@ func TestNotifyAdmin(t *testing.T) {
 }
 
 func TestTriggerNotifyAdmin(t *testing.T) {
+	mainHelper.Parallel(t)
 	t.Run("error when EnableAPITriggerAdminNotifications is not true", func(t *testing.T) {
+		mainHelper.Parallel(t)
 		th := Setup(t).InitBasic()
 		defer th.TearDown()
 
@@ -132,6 +142,7 @@ func TestTriggerNotifyAdmin(t *testing.T) {
 	})
 
 	t.Run("error when non admins try to trigger notifications", func(t *testing.T) {
+		mainHelper.Parallel(t)
 		th := Setup(t).InitBasic()
 		defer th.TearDown()
 
@@ -145,6 +156,7 @@ func TestTriggerNotifyAdmin(t *testing.T) {
 	})
 
 	t.Run("happy path", func(t *testing.T) {
+		mainHelper.Parallel(t)
 		th := Setup(t)
 		defer th.TearDown()