[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/app/authorization_test.go

@@ -118,6 +118,7 @@ func TestSessionHasPermissionToAndNotRestrictedAdmin(t *testing.T) {
 }
 
 func TestCheckIfRolesGrantPermission(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t)
 	defer th.TearDown()
 
@@ -144,12 +145,14 @@ func TestCheckIfRolesGrantPermission(t *testing.T) {
 }
 
 func TestChannelRolesGrantPermission(t *testing.T) {
+	mainHelper.Parallel(t)
 	testPermissionInheritance(t, func(t *testing.T, th *TestHelper, testData permissionInheritanceTestData) {
 		require.Equal(t, testData.shouldHavePermission, th.App.RolesGrantPermission([]string{testData.channelRole.Name}, testData.permission.Id), "row: %+v\n", testData.truthTableRow)
 	})
 }
 
 func TestHasPermissionToTeam(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -167,6 +170,7 @@ func TestHasPermissionToTeam(t *testing.T) {
 }
 
 func TestSessionHasPermissionToTeams(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -225,6 +229,7 @@ func TestSessionHasPermissionToTeams(t *testing.T) {
 }
 
 func TestSessionHasPermissionToChannel(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -296,6 +301,7 @@ func TestSessionHasPermissionToChannel(t *testing.T) {
 }
 
 func TestSessionHasPermissionToChannels(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -444,6 +450,7 @@ func TestSessionHasPermissionToChannels(t *testing.T) {
 }
 
 func TestHasPermissionToUser(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -453,6 +460,7 @@ func TestHasPermissionToUser(t *testing.T) {
 }
 
 func TestSessionHasPermissionToManageBot(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -564,6 +572,7 @@ func TestSessionHasPermissionToManageBot(t *testing.T) {
 }
 
 func TestSessionHasPermissionToUser(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -614,6 +623,7 @@ func TestSessionHasPermissionToUser(t *testing.T) {
 }
 
 func TestSessionHasPermissionToManageUserOrBot(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -669,6 +679,7 @@ func TestSessionHasPermissionToManageUserOrBot(t *testing.T) {
 }
 
 func TestHasPermissionToCategory(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 	session, err := th.App.CreateSession(th.Context, &model.Session{UserId: th.BasicUser.Id, Props: model.StringMap{}})
@@ -687,6 +698,7 @@ func TestHasPermissionToCategory(t *testing.T) {
 }
 
 func TestSessionHasPermissionToGroup(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -771,6 +783,7 @@ func TestSessionHasPermissionToGroup(t *testing.T) {
 }
 
 func TestHasPermissionToReadChannel(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -885,6 +898,7 @@ func TestHasPermissionToReadChannel(t *testing.T) {
 }
 
 func TestSessionHasPermissionToChannelByPost(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -948,6 +962,7 @@ func TestSessionHasPermissionToChannelByPost(t *testing.T) {
 }
 
 func TestHasPermissionToChannelByPost(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()