tests: don't run coding style tests in unit tests

We run them in coding style test suite already.

Also these test now need business template repository properly
configured in template tool, which is not set in default setup, so
keeping them working would require extra work.
3 jobs for feat/coding_style_rebuild_bt
Status Job ID Name Coverage
  External
running ERP5.CodingStyleTest-TestRunner1

36114:11:43

running ERP5.PerformanceTest-TestRunner1

36114:11:25

running ERP5.UnitTest-TestRunner1

36114:12:01