Disable morph logging during TestMain (#30948)

* rm "No TEST_DATABASE... override" log message

Let's only log if this value is actually overridden.

* rm "(Created|Dropped) temporary database" message

* only log "Pinging SQL" on subsequent attempts

* disable morph logging from TestMain

* Fix style issues in store test files

- Add missing parameter to migrate() function calls in tests
- Remove unused log function in settings.go
- Fix formatting with go fmt

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* within sqlstore, use "enable" vs "disable" for clarity

* remove trailing newline from morph logs

---------

Co-authored-by: Claude <noreply@anthropic.com>

server/channels/store/searchlayer/layer_test.go

@@ -28,7 +28,7 @@ func TestUpdateConfigRace(t *testing.T) {
 		driverName = model.DatabaseDriverPostgres
 	}
 	settings := storetest.MakeSqlSettings(driverName, false)
-	store, err := sqlstore.New(*settings, logger, nil)
+	store, err := sqlstore.New(*settings, logger, nil, sqlstore.DisableMorphLogging())
 	require.NoError(t, err)
 
 	cfg := &model.Config{}