extra metadata option for selective version of property collection

[andy-beer]

This change adds an optional extra argument to the selective_version_of_collection() function, allowing extra metadata to play a role in property selection.

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (01ab596) 80.92% compared to head (7c77ced) 80.92%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #734   +/-   ##
=======================================
  Coverage   80.92%   80.92%           
=======================================
  Files         190      190           
  Lines       32377    32384    +7     
=======================================
+ Hits        26200    26207    +7     
  Misses       6177     6177           

Impacted Files	Coverage Δ
resqpy/property/property_collection.py	82.79% <ø> (ø)
resqpy/property/property_common.py	93.51% <ø> (ø)
resqpy/property/_collection_add_part.py	81.20% <100.00%> (+0.50%)	⬆️

... and 1 file with indirect coverage changes

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