modification of hand.is_on()

[ClaireHzl]

• delete of the gripper assessment for the hand to be on or off (allows to do arm moves even if only the gripper is off)
• add of the grippers' opening for the set_pose "default"
• add of unitary tests

[github-actions[bot]]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
829	758	91%	0%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
tests/units/online/test_advanced_goto_functions.py	100%	🟢
tests/units/online/test_hand.py	100%	🟢
TOTAL	100%	🟢

updated for commit: d7fd84b by action🐍