chore: add strict=True kwarg to more modules

[andrijapau]

Follow up to #8164, #8182.

ruff check --select B905 <modules> --fix

Adds kwarg to zips found in these modules,

• pytrees
• qchem
• optimize

[sc-98487]

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.69%. Comparing base (bb3885e) to head (4745e10).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8183      +/-   ##
==========================================
- Coverage   99.69%   99.69%   -0.01%     
==========================================
  Files         548      548              
  Lines       56811    56811              
==========================================
- Hits        56637    56636       -1     
- Misses        174      175       +1     

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[JerryChen97]

LGTM