[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/commands_test.go

@@ -17,6 +17,7 @@ import (
 )
 
 func TestEchoCommand(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -41,6 +42,7 @@ func TestEchoCommand(t *testing.T) {
 }
 
 func TestGroupmsgCommands(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -89,6 +91,7 @@ func TestGroupmsgCommands(t *testing.T) {
 }
 
 func TestInvitePeopleCommand(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -167,10 +170,12 @@ func testJoinCommands(t *testing.T, alias string) {
 }
 
 func TestJoinCommands(t *testing.T) {
+	mainHelper.Parallel(t)
 	testJoinCommands(t, "join")
 }
 
 func TestLoadTestHelpCommands(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -190,6 +195,7 @@ func TestLoadTestHelpCommands(t *testing.T) {
 }
 
 func TestLoadTestSetupCommands(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -209,6 +215,7 @@ func TestLoadTestSetupCommands(t *testing.T) {
 }
 
 func TestLoadTestUsersCommands(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -228,6 +235,7 @@ func TestLoadTestUsersCommands(t *testing.T) {
 }
 
 func TestLoadTestChannelsCommands(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -247,6 +255,7 @@ func TestLoadTestChannelsCommands(t *testing.T) {
 }
 
 func TestLoadTestPostsCommands(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -266,6 +275,7 @@ func TestLoadTestPostsCommands(t *testing.T) {
 }
 
 func TestLeaveCommands(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -322,6 +332,7 @@ func TestLeaveCommands(t *testing.T) {
 }
 
 func TestLogoutTestCommand(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -330,6 +341,7 @@ func TestLogoutTestCommand(t *testing.T) {
 }
 
 func TestMeCommand(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -357,6 +369,7 @@ func TestMeCommand(t *testing.T) {
 }
 
 func TestMsgCommands(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -404,10 +417,12 @@ func TestMsgCommands(t *testing.T) {
 }
 
 func TestOpenCommands(t *testing.T) {
+	mainHelper.Parallel(t)
 	testJoinCommands(t, "open")
 }
 
 func TestSearchCommand(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -416,6 +431,7 @@ func TestSearchCommand(t *testing.T) {
 }
 
 func TestSettingsCommand(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -424,6 +440,7 @@ func TestSettingsCommand(t *testing.T) {
 }
 
 func TestShortcutsCommand(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -432,6 +449,7 @@ func TestShortcutsCommand(t *testing.T) {
 }
 
 func TestShrugCommand(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -452,6 +470,7 @@ func TestShrugCommand(t *testing.T) {
 }
 
 func TestStatusCommands(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()