Add info to tutorial about casacore/casatools incompatibility

[bhazelton]

Description

Add a note in the tutorial about the incompatibility of casacore and casatools.

Motivation and Context

closes #1625

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation change (documentation changes only)
• Version change
• Build or continuous integration change
• Other

Checklist:

• I have read the contribution guide.
• My code follows the code style of this project.

Documentation change checklist:

• Any updated docstrings use the numpy docstring format.
• If this is a significant change to the readme or other docs, I have checked that they are rendered properly on ReadTheDocs. You can check this via the RTD CI build.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.93%. Comparing base (5fca0c3) to head (99decbf).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1666   +/-   ##
=======================================
  Coverage   99.93%   99.93%           
=======================================
  Files          67       67           
  Lines       22864    22864           
=======================================
  Hits        22850    22850           
  Misses         14       14           

☔ 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.

[dannyjacobs]

this is helpful. Would I have seen it when I found the problem? maybe? if I'd searched for the docs for "segfault". but its impossible to emphasize everything.