Only use single primary identifier without any suffix

This MR uses only the first component of the primary identifier so that we do no longer generate very long primary identifiers and that they map to a distinct native analyser rule. The complete mappings are still available by means of the secondary identifiers array.

The -X suffixes can be stripped as they are not relevant with regards to the rule mappings. For example, the four bandit rules below are just components/sub-rules of B301 so that they could all just be mapped to B301.

  - id: "B301"
    rules:
    - "python/deserialization/rule-cpickle"
    - "python/deserialization/rule-shelve"
    - "python/deserialization/rule-pickle"
    - "python/deserialization/rule-dill"