Add WithSkipMissing to not fail import on missing blobs

[brandond]

Proposed Changes

Add WithSkipMissing to not fail import on missing blobs.

Fix an issue where archives produced by ctr image export cannot be imported, unless the images are pulled and exported with the --all-platforms flag.

Types of Changes

enhancement

Verification

See linked issue

Testing

Linked Issues

• K3s fails to import tarball produced by ctr image export #10132

User-Facing Change

Further Comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 41.63%. Comparing base (1d22b69) to head (af470b7).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10136      +/-   ##
==========================================
- Coverage   47.58%   41.63%   -5.96%     
==========================================
  Files         173      173              
  Lines       14651    14651              
==========================================
- Hits         6972     6100     -872     
- Misses       6348     7385    +1037     
+ Partials     1331     1166     -165     

Flag	Coverage Δ
e2etests	36.39% <100.00%> (-9.88%)	⬇️
inttests	19.79% <0.00%> (ø)
unittests	11.38% <0.00%> (ø)

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