Read very old stata DTA files
This should close #12232, although the issue may resurface for files containing double values (I can't determine the old type code for doubles).

@kshedden looks good.

can you add a release note and fix flake8 issues (that's why the build failed)
 looks good. minor flake8 issue to fix & pls add a release note & squash. ping when green.
 @jreback it's squashed, etc. but I get what seems to be an unrelated test error (numexpr) on only one platform
 @kshedden thanks!
