fix: create new context for bare-metal deployer

[shawnh2]

for bare-metal mode, deployment and operation are using the same ctx, causing the running binaries to shutdown if we pass the value to --timeout.

so the fix here is: separate the ctx of deployment and operation, do not let --timeout disturb the running binaries.

[codecov-commenter]

Codecov Report

Patch coverage: 33.33% and project coverage change: +0.15% 🎉

Comparison is base (6366341) 31.86% compared to head (99095fd) 32.02%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #148      +/-   ##
===========================================
+ Coverage    31.86%   32.02%   +0.15%     
===========================================
  Files            9        9              
  Lines         1293     1296       +3     
===========================================
+ Hits           412      415       +3     
  Misses         787      787              
  Partials        94       94              

Files Changed	Coverage Δ
pkg/cmd/gtctl/cluster/create/create.go	0.00% <0.00%> (ø)
pkg/deployer/baremetal/deployer.go	35.86% <37.50%> (+0.70%)	⬆️

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