fix: add missing self to reindex_subcomponent_taxa

[steps-re]

TaxonNamespaceAssociated.reindex_subcomponent_taxa is defined without self:

def reindex_subcomponent_taxa():
    raise NotImplementedError()

but it's called as self.reindex_subcomponent_taxa() from reindex_taxa(). Any class that relies on the base stub (instead of overriding it) hits a TypeError the moment reindex_taxa() runs, instead of the intended NotImplementedError.

TreeList is one such class: it doesn't override reindex_subcomponent_taxa... wait, it does, but with the identical bug in treecollectionmodel.py:

def reindex_subcomponent_taxa():
    raise NotImplementedError()

Repro before the fix:

import dendropy
tl = dendropy.TreeList.get(data='(A,(B,C));', schema='newick')
tl.reindex_taxa()
# TypeError: TreeList.reindex_subcomponent_taxa() takes 0 positional arguments but 1 was given

Tree.reindex_taxa() and CharacterMatrix.reindex_taxa() work fine since those subclasses override reindex_subcomponent_taxa(self) correctly with self already. This PR adds the missing self to the two remaining definitions so the call succeeds and, for classes without a real implementation, raises NotImplementedError as designed rather than crashing with a confusing TypeError.

Ran the taxon and tree-collection test suites plus the full unit suite locally: 884 passed, 4 pre-existing failures unrelated to this change (they need the external paup binary, which isn't installed in my environment).

[mmore500]

Thanks for the contribution @steps-re ! I can add a regression test based on the minimum working bug you provided, and hopefully get this merged in and release a patch shortly.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.70%. Comparing base (75bc2ae) to head (2e27011).
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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #233   +/-   ##
=======================================
  Coverage   88.69%   88.70%           
=======================================
  Files         114      114           
  Lines       12844    12853    +9     
=======================================
+ Hits        11392    11401    +9     
  Misses       1452     1452           

Flag	Coverage Δ
unittests	88.70% <100.00%> (+<0.01%)	⬆️

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[mmore500]

Thanks again for the contribution @steps-re , the fix should be deployed as v5.0.10. Let us know any other issues you turn up!