set /home/admin file permissions for sr linux

[hellt]

fix #1831

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (404e6f9) 51.78% compared to head (39de17d) 51.81%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1832      +/-   ##
==========================================
+ Coverage   51.78%   51.81%   +0.02%     
==========================================
  Files         148      148              
  Lines       14548    14548              
==========================================
+ Hits         7534     7538       +4     
+ Misses       6180     6177       -3     
+ Partials      834      833       -1     

Files	Coverage Δ
nodes/srl/srl.go	58.26% <100.00%> (ø)
runtime/docker/docker.go	68.17% <100.00%> (ø)

... and 1 file with indirect coverage changes