fix: Properly propagate strict flag when constructing a Struct Series from any values

[stinodego]

Also includes a bunch of tests to make sure struct construction is correct.

There is room for improvement here, but it's correct so I'll leave it for now.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.34%. Comparing base (c1df38a) to head (556a52e).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15302      +/-   ##
==========================================
- Coverage   81.34%   81.34%   -0.01%     
==========================================
  Files        1364     1364              
  Lines      176569   176614      +45     
  Branches     2526     2526              
==========================================
+ Hits       143632   143664      +32     
- Misses      32454    32466      +12     
- Partials      483      484       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.