[ws-manager] Revert #4338 and fix /dev/net/tun permissions

[aledbf]

@fntlnz thank you for finding the issue :)

[codecov]

Codecov Report

Merging #4596 (57fb2c3) into main (8552d9e) will increase coverage by 36.22%.
The diff coverage is n/a.

❗ Current head 57fb2c3 differs from pull request most recent head aa746cd. Consider uploading reports for the commit aa746cd to get more accurate results

@@            Coverage Diff            @@
##           main    #4596       +/-   ##
=========================================
+ Coverage      0   36.22%   +36.22%     
=========================================
  Files         0       14       +14     
  Lines         0     3865     +3865     
=========================================
+ Hits          0     1400     +1400     
- Misses        0     2348     +2348     
- Partials      0      117      +117     

Flag	Coverage Δ
components-ws-manager-app	36.22% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
components/ws-manager/pkg/manager/create.go	78.91% <ø> (ø)
components/ws-manager/pkg/manager/headless.go	44.00% <0.00%> (ø)
...s/ws-manager/pkg/manager/internal/grpcpool/pool.go	74.46% <0.00%> (ø)
components/ws-manager/pkg/manager/probe.go	0.00% <0.00%> (ø)
components/ws-manager/pkg/manager/status.go	72.14% <0.00%> (ø)
components/ws-manager/pkg/manager/metrics.go	11.26% <0.00%> (ø)
...omponents/ws-manager/pkg/manager/pod_controller.go	0.00% <0.00%> (ø)
components/ws-manager/pkg/manager/annotations.go	66.66% <0.00%> (ø)
components/ws-manager/pkg/manager/monitor.go	0.00% <0.00%> (ø)
... and 5 more

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