QDAC2: start_once_on triggers

[jpsecher]

• Additional init is not needed anymore

[codecov-commenter]

Codecov Report

Merging #257 (b65ca5c) into main (7575e0d) will increase coverage by 0.23%.
The diff coverage is 80.00%.

@@            Coverage Diff             @@
##             main     #257      +/-   ##
==========================================
+ Coverage   19.83%   20.07%   +0.23%     
==========================================
  Files         146      146              
  Lines       18160    18234      +74     
==========================================
+ Hits         3602     3660      +58     
- Misses      14558    14574      +16     

Files	Coverage Δ
...ntrib_drivers/tests/QDevil/test_sim_qdac2_array.py	100.00% <100.00%> (ø)
...contrib_drivers/tests/QDevil/test_sim_qdac2_awg.py	100.00% <100.00%> (ø)
...rib_drivers/tests/QDevil/test_sim_qdac2_current.py	100.00% <100.00%> (ø)
...ontrib_drivers/tests/QDevil/test_sim_qdac2_sine.py	100.00% <ø> (ø)
...drivers/tests/QDevil/test_sim_qdac2_source_list.py	100.00% <ø> (ø)
...rivers/tests/QDevil/test_sim_qdac2_source_sweep.py	100.00% <ø> (ø)
...trib_drivers/tests/QDevil/test_sim_qdac2_square.py	100.00% <ø> (ø)
...ib_drivers/tests/QDevil/test_sim_qdac2_triangle.py	100.00% <ø> (ø)
...ivers/tests/QDevil/test_sim_qdac2_virtual_gates.py	100.00% <ø> (ø)
qcodes_contrib_drivers/drivers/QDevil/QDAC2.py	94.37% <69.23%> (-1.29%)	⬇️

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