Revert "Don't call buildFinished after we already know it failed"

Dependencies

• [2] 5HFMGRVJ Don't call buildFinished after we already know it failed
• [3] PHNLYPKB Call buildFinished when a cached build is added

Change contents

• replacement in src/lib/Hydra/Helper/PluginHooks.pm at line 17
  [3.652]→[2.0:58](∅→∅)
  − print STDERR "\$plugin->buildFinished: $@\n";
  [3.652]

  [3.709]
  + print STDERR "$plugin->buildFinished: $@\n";