[dmt] Make a check for the weight of the non critical module

[RottenRat]

Case:

name: test-non-critical
weight: 10
stage: Experimental
descriptions:
  en: "Test description"

Before:
OK
After:
Warning

🐒 [definition-file (#module)]
     Message:      Unnecessary field 'weight' must be removed for non-critical module
     Module:       test-non-critical
     FilePath:     module.yaml