Add workaround for containerd hosts.toml bug when passing config for default registry endpoint

[brandond]

Proposed Changes

Add base [host] tree to containerd hosts.toml to work around containerd bug

Types of Changes

bugfix

Verification

See linked issue

Testing

Linked Issues

• Registry TLS configuration from registries.yaml is only honored for mirror endpoints #9839
• Error parsing hosts.toml without any host tree containerd/containerd#10027

User-Facing Change

Further Comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.73%. Comparing base (7f65975) to head (f3bed77).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9853      +/-   ##
==========================================
- Coverage   52.67%   46.73%   -5.94%     
==========================================
  Files         157      157              
  Lines       13822    13822              
==========================================
- Hits         7281     6460     -821     
- Misses       5155     6125     +970     
+ Partials     1386     1237     -149     

Flag	Coverage Δ
e2etests	39.76% <ø> (-9.50%)	⬇️
inttests	39.42% <ø> (+17.29%)	⬆️
unittests	16.82% <ø> (ø)

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