Provide ability to re-link the TRACEABILITY_ITEM_ID

[JasperCraeghs]

If the item ID matched by TRACEABILITY_ITEM_ID_REGEX is incorrect, e.g. it does not exist in the collection of
traceability items, you can configure the plugin to link to the desired item ID instead.
Add the item ID returned by Coverity as a key to the Python dictionary TRACEABILITY_ITEM_ID_REGEX and the desired
item ID as value. Example:

  TRACEABILITY_ITEM_RELINK = {
      "STATIC_DEVIATE-MISRA_RULE_1_0": "STATIC_DEVIATE-MISRA_1_0",
  }

Closes #62

[Letme]

Nice job 😉