update agents images to 7.48.0

[adel121]

What does this PR do?

Deploys 7.48.0 by default.

Checklist

• PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• PR has a milestone or the qa/skip-qa label

[codecov-commenter]

Codecov Report

Merging #943 (b95579a) into main (eddfc41) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #943   +/-   ##
=======================================
  Coverage   56.82%   56.82%           
=======================================
  Files         155      155           
  Lines       19279    19279           
=======================================
  Hits        10956    10956           
  Misses       7675     7675           
  Partials      648      648           

Flag	Coverage Δ
unittests	56.82% <ø> (ø)

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Files	Coverage Δ
pkg/defaulting/images.go	100.00% <ø> (ø)

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