[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/group_test.go

@@ -18,6 +18,7 @@ import (
 )
 
 func TestGetGroup(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t)
 	defer th.TearDown()
 
@@ -69,6 +70,7 @@ func TestGetGroup(t *testing.T) {
 }
 
 func TestCreateGroup(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t)
 	defer th.TearDown()
 
@@ -179,6 +181,7 @@ func TestCreateGroup(t *testing.T) {
 }
 
 func TestDeleteGroup(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t)
 	defer th.TearDown()
 
@@ -224,6 +227,7 @@ func TestDeleteGroup(t *testing.T) {
 }
 
 func TestUndeleteGroup(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t)
 	defer th.TearDown()
 
@@ -256,6 +260,7 @@ func TestUndeleteGroup(t *testing.T) {
 }
 
 func TestPatchGroup(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t)
 	defer th.TearDown()
 
@@ -359,6 +364,7 @@ func TestPatchGroup(t *testing.T) {
 }
 
 func TestLinkGroupTeam(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -472,6 +478,7 @@ func TestLinkGroupTeam(t *testing.T) {
 }
 
 func TestLinkGroupChannel(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -597,6 +604,7 @@ func TestLinkGroupChannel(t *testing.T) {
 }
 
 func TestUnlinkGroupTeam(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -716,6 +724,7 @@ func TestUnlinkGroupTeam(t *testing.T) {
 }
 
 func TestUnlinkGroupChannel(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -997,6 +1006,7 @@ func TestUnlinkGroupChannel(t *testing.T) {
 }
 
 func TestGetGroupTeam(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -1060,6 +1070,7 @@ func TestGetGroupTeam(t *testing.T) {
 }
 
 func TestGetGroupChannel(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -1123,6 +1134,7 @@ func TestGetGroupChannel(t *testing.T) {
 }
 
 func TestGetGroupTeams(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t)
 	defer th.TearDown()
 
@@ -1177,6 +1189,7 @@ func TestGetGroupTeams(t *testing.T) {
 }
 
 func TestGetGroupChannels(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -1230,6 +1243,7 @@ func TestGetGroupChannels(t *testing.T) {
 }
 
 func TestPatchGroupTeam(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -1303,6 +1317,7 @@ func TestPatchGroupTeam(t *testing.T) {
 }
 
 func TestPatchGroupChannel(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -1387,6 +1402,7 @@ func TestPatchGroupChannel(t *testing.T) {
 }
 
 func TestGetGroupsByChannel(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -1530,6 +1546,7 @@ func TestGetGroupsByChannel(t *testing.T) {
 }
 
 func TestGetGroupsAssociatedToChannelsByTeam(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -1682,6 +1699,7 @@ func TestGetGroupsAssociatedToChannelsByTeam(t *testing.T) {
 }
 
 func TestGetGroupsByTeam(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -1874,6 +1892,7 @@ func TestGetGroupsByTeam(t *testing.T) {
 }
 
 func TestGetGroups(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -2256,6 +2275,7 @@ func TestGetGroups(t *testing.T) {
 }
 
 func TestGetGroupsByUserId(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -2327,6 +2347,7 @@ func TestGetGroupsByUserId(t *testing.T) {
 }
 
 func TestGetGroupMembers(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -2394,6 +2415,7 @@ func TestGetGroupMembers(t *testing.T) {
 }
 
 func TestGetGroupStats(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
 
@@ -2443,6 +2465,7 @@ func TestGetGroupStats(t *testing.T) {
 }
 
 func TestGetGroupsGroupConstrainedParentTeam(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t)
 	defer th.TearDown()
 
@@ -2526,6 +2549,7 @@ func TestGetGroupsGroupConstrainedParentTeam(t *testing.T) {
 }
 
 func TestAddMembersToGroup(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t)
 	defer th.TearDown()
 
@@ -2699,6 +2723,7 @@ func TestAddMembersToGroup(t *testing.T) {
 }
 
 func TestDeleteMembersFromGroup(t *testing.T) {
+	mainHelper.Parallel(t)
 	th := Setup(t)
 	defer th.TearDown()