Making S2gate of lab and lab_dev the same

[arsalan-motamedi]

Context:
there is a discrepancy between lab and lab_dev in defining S2gate : squeezing parameter of one is the negative of the other.

Description of the Change:
Making S2gate of lab and lab_dev compatible by changing the lab_dev one.

Benefits:
Consistency.

Possible Drawbacks:
None

Related GitHub Issues:
None

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.05%. Comparing base (5a11703) to head (701051b).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #548   +/-   ##
========================================
  Coverage    90.05%   90.05%           
========================================
  Files          102      102           
  Lines         6222     6222           
========================================
  Hits          5603     5603           
  Misses         619      619           

Files with missing lines	Coverage Δ
...mustard/lab_dev/states/two_mode_squeezed_vacuum.py	100.00% <ø> (ø)
mrmustard/lab_dev/transformations/s2gate.py	100.00% <ø> (ø)
mrmustard/physics/triples.py	100.00% <100.00%> (ø)

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5a11703...701051b. Read the comment docs.