DM-41321: Add try-except block to manifest checker so that failure to get butler logs does not make error reporting impossible

[eigerx]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (0a17352) 82.47% compared to head (e084f20) 82.43%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #384      +/-   ##
==========================================
- Coverage   82.47%   82.43%   -0.04%     
==========================================
  Files          92       92              
  Lines       10354    10356       +2     
  Branches     1952     1953       +1     
==========================================
- Hits         8539     8537       -2     
- Misses       1473     1476       +3     
- Partials      342      343       +1     

Files	Coverage Δ
tests/test_execution_reports.py	100.00% <100.00%> (ø)
python/lsst/pipe/base/execution_reports.py	75.00% <50.00%> (-1.23%)	⬇️

... and 1 file with indirect coverage changes

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[kherner]

It might be worth printing a message here that you did miss some files just so people know that it happened, unless that's dealt with elsewhere.