adjust for new error message in git cat-file

[adswa]

Since at least Git 2.39.2, the error reads:

❱ git cat-file -p git-annex:remote.log fatal: invalid object name 'git-annex'.

This change adjusts for this in a similar way it has so far been accounted for

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 91.24%. Comparing base (ed8da62) to head (60ae7c5). Report is 18 commits behind head on maint.

Additional details and impacted files

@@           Coverage Diff           @@
##            maint    #7559   +/-   ##
=======================================
  Coverage   91.23%   91.24%           
=======================================
  Files         325      325           
  Lines       43440    43446    +6     
  Branches     5785     5785           
=======================================
+ Hits        39633    39641    +8     
+ Misses       3792     3790    -2     
  Partials       15       15           

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[adswa]

The extension test for datalad-container failing is unrelated - its a missing dependency for the singularity installation.

[yarikoptic]

I am promoting this PR to major advancement of datalad.