chore(shortint): use TEST_ params as much as possible in tests

[nsarlin-zama]

closes: please link all relevant issues

PR content/description

shortint use a mix of test and default params.

I asked Claude to do a review of the params used in shortint _ci_run_filter tests before the pr:

  ┌──────────────────────┬───────┐
  │       Category       │ Count │
  ├──────────────────────┼───────┤
  │ No params            │ 9     │
  ├──────────────────────┼───────┤
  │ TEST_ only           │ 17    │
  ├──────────────────────┼───────┤
  │ PARAM_ only          │ 10    │
  ├──────────────────────┼───────┤
  │ Mixed TEST_ + PARAM_ │ 3     │
  ├──────────────────────┼───────┤
  │ Total                │ 39    │
  └──────────────────────┴───────┘

This pr standardises this and try to use TEST_ params as much as possible.

Should be merged after #3474