MM-51768: Scrub username/password from SQL datasource (#22731)

https://mattermost.atlassian.net/browse/MM-51768
```release-note
NONE
```

server/config/database_test.go

@@ -1107,12 +1107,12 @@ func TestDatabaseStoreString(t *testing.T) {
 	if *mainHelper.GetSQLSettings().DriverName == "postgres" {
 		maskedDSN := ds.String()
 		assert.True(t, strings.HasPrefix(maskedDSN, "postgres://"))
-		assert.True(t, strings.Contains(maskedDSN, "mmuser"))
+		assert.False(t, strings.Contains(maskedDSN, "mmuser"))
 		assert.False(t, strings.Contains(maskedDSN, "mostest"))
 	} else {
 		maskedDSN := ds.String()
-		assert.True(t, strings.HasPrefix(maskedDSN, "mysql://"))
-		assert.True(t, strings.Contains(maskedDSN, "mmuser"))
+		assert.False(t, strings.HasPrefix(maskedDSN, "mysql://"))
+		assert.False(t, strings.Contains(maskedDSN, "mmuser"))
 		assert.False(t, strings.Contains(maskedDSN, "mostest"))
 	}
 }