[workspacekit] Establish IWS conn for proc mounts

[csweichel]

This PR fixes a bug introduced in #5299 where we'd use a closed client to affect proc and sysfs mounts.

fixes #5171

How to test

cd test
go test -v -run TestRunDocker ./...

[codecov]

Codecov Report

Merging #5407 (dc15065) into main (8aab84e) will increase coverage by 7.22%.
The diff coverage is 0.00%.

❗ Current head dc15065 differs from pull request most recent head c01e080. Consider uploading reports for the commit c01e080 to get more accurate results

@@           Coverage Diff           @@
##           main   #5407      +/-   ##
=======================================
+ Coverage      0   7.22%   +7.22%     
=======================================
  Files         0       3       +3     
  Lines         0     609     +609     
=======================================
+ Hits          0      44      +44     
- Misses        0     562     +562     
- Partials      0       3       +3     

Flag	Coverage Δ
components-workspacekit-app	7.22% <0.00%> (?)

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

Impacted Files	Coverage Δ
components/workspacekit/cmd/rings.go	7.10% <0.00%> (ø)
components/workspacekit/cmd/lift.go	18.18% <0.00%> (ø)
components/workspacekit/cmd/root.go	0.00% <0.00%> (ø)

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[aledbf]

/approve
/lgtm

[roboquat]

LGTM label has been added.

Git tree hash: 540039a8c369cd921a6a3e8dc2a59f4a06caba3f

[roboquat]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf

Associated issue: #5171

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