pkg/archive: Use map of long names avoiding max path limits

[kaovilai]

Signed-off-by: Tiger Kaovilai [email protected]

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Please add a summary of your change

pkg/archive: Use map of long names avoiding max path limits

Test image: ghcr.io/kaovilai/velero:maxpathlimits-a2699e765 for amd64, arm64

Does your change fix a particular issue?

Fixes #8434

Please indicate you've done the following:

• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file (make new-changelog) or comment /kind changelog-not-required on this PR.
• Updated the corresponding documentation in site/content/docs/main.

[codecov]

Codecov Report

Attention: Patch coverage is 86.04651% with 6 lines in your changes missing coverage. Please review.

Project coverage is 59.00%. Comparing base (9f0026d) to head (a2699e7).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/archive/extractor.go	70.58%	5 Missing ⚠️
pkg/restore/prioritize_group_version.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8449      +/-   ##
==========================================
+ Coverage   58.98%   59.00%   +0.01%     
==========================================
  Files         368      368              
  Lines       39000    39017      +17     
==========================================
+ Hits        23004    23021      +17     
  Misses      14532    14532              
  Partials     1464     1464              

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