First batch of new plugin api methods (#9022)

update api mocks

Generated new hooks

ChannelHasJoinedChannel Implementation

User Left Team/Channel Hook; User Joined Team Hook Implementation

Update RPC Client and Mocks

gofmt

go tests fix

Add Config API Methods

codegne

Add Channel Has Been Created Hook

Fix ChannelHasBeenCreated hook

fix missing context param

fix duplicate hooks; remove redudandcy

api4/channel_test.go

@@ -1837,9 +1837,6 @@ func TestRemoveChannelMember(t *testing.T) {
 		t.Fatal("should have passed")
 	}
 
-	_, resp = Client.RemoveUserFromChannel(th.BasicChannel.Id, th.BasicUser2.Id)
-	CheckNoError(t, resp)
-
 	_, resp = Client.RemoveUserFromChannel(th.BasicChannel.Id, "junk")
 	CheckBadRequestStatus(t, resp)