[fix] : add context timeout when making listNodes k8s call

[rahulait]

This fix adds a timeout for listNodes k8s call so that if apiserver is not responding, the call should timeout after some time and not hang indefinitely somehow.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.98%. Comparing base (6d72edb) to head (cac06b9).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #361      +/-   ##
==========================================
+ Coverage   72.95%   72.98%   +0.03%     
==========================================
  Files          14       14              
  Lines        2596     2599       +3     
==========================================
+ Hits         1894     1897       +3     
  Misses        537      537              
  Partials      165      165              

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