Overload bandedrowsdata for SubArray

[dlfivefifty]

@DanielVandH the last PR triggered a bug in ClassicalOPs.jl. This should fix it and add a downstream test

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.98%. Comparing base (62e8561) to head (e3450b9).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #487      +/-   ##
==========================================
+ Coverage   89.80%   89.98%   +0.17%     
==========================================
  Files          27       27              
  Lines        3719     3733      +14     
==========================================
+ Hits         3340     3359      +19     
+ Misses        379      374       -5     

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.