Do not share setup when the specs modify the setup data.

These tests modify data that was set up by the before :all block.
Those modifications will be visible to subsequent tests and so will
introduce an ordering dependency, making them bad tests.

See also https://github.com/NUBIC/ncs_navigator_core/commit/0ba032947390aa627bef8875d1b151729cd9b484#commitcomment-3360412
Remove participant setup for sample. #3904.

ParticipantConsentSample#participant was removed in 4ff5e396.