[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/command_autocomplete_test.go

@@ -15,6 +15,7 @@ import (
 )
 
 func TestParseStaticListArgument(t *testing.T) {
+	mainHelper.Parallel(t)
 	items := []model.AutocompleteListItem{
 		{
 			Hint:     "[hint]",
@@ -25,12 +26,12 @@ func TestParseStaticListArgument(t *testing.T) {
 	fixedArgs := &model.AutocompleteStaticListArg{PossibleArguments: items}
 
 	argument := &model.AutocompleteArg{
-		Name:     "", //positional
+		Name:     "", // positional
 		HelpText: "some_help",
 		Type:     model.AutocompleteArgTypeStaticList,
 		Data:     fixedArgs,
 	}
-	found, _, _, suggestions := parseStaticListArgument(argument, "", "") //TODO understand this!
+	found, _, _, suggestions := parseStaticListArgument(argument, "", "") // TODO understand this!
 	assert.True(t, found)
 	assert.Equal(t, []model.AutocompleteSuggestion{{Complete: "on", Suggestion: "on", Hint: "[hint]", Description: "help"}}, suggestions)
 
@@ -91,8 +92,9 @@ func TestParseStaticListArgument(t *testing.T) {
 }
 
 func TestParseInputTextArgument(t *testing.T) {
+	mainHelper.Parallel(t)
 	argument := &model.AutocompleteArg{
-		Name:     "", //positional
+		Name:     "", // positional
 		HelpText: "some_help",
 		Type:     model.AutocompleteArgTypeText,
 		Data:     &model.AutocompleteTextArg{Hint: "hint", Pattern: "pat"},
@@ -136,8 +138,9 @@ func TestParseInputTextArgument(t *testing.T) {
 }
 
 func TestParseNamedArguments(t *testing.T) {
+	mainHelper.Parallel(t)
 	argument := &model.AutocompleteArg{
-		Name:     "name", //named
+		Name:     "name", // named
 		HelpText: "some_help",
 		Type:     model.AutocompleteArgTypeText,
 		Data:     &model.AutocompleteTextArg{Hint: "hint", Pattern: "pat"},
@@ -201,6 +204,7 @@ func TestParseNamedArguments(t *testing.T) {
 }
 
 func TestSuggestions(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t)
 	defer th.TearDown()
 
@@ -327,6 +331,7 @@ func TestSuggestions(t *testing.T) {
 }
 
 func TestCommandWithOptionalArgs(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t)
 	defer th.TearDown()
 
@@ -614,6 +619,7 @@ func createJiraAutocompleteData() *model.AutocompleteData {
 }
 
 func TestDynamicListArgsForBuiltin(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t)
 	defer th.TearDown()
 
@@ -637,8 +643,7 @@ func TestDynamicListArgsForBuiltin(t *testing.T) {
 	})
 }
 
-type testCommandProvider struct {
-}
+type testCommandProvider struct{}
 
 func (p *testCommandProvider) GetTrigger() string {
 	return "bogus"