[ws-daemon] Remove old sandboxing behaviour

[csweichel]

fixes #4993

We used to have some means to limit the size of a workspace by placing its content in a loopback-mounted file. This mechanism never worked well and we haven't enabled it in about a year's time. Now, with recent harmonisation on the config surface (#4969) we inadvertently re-enabled this old behaviour.

This PR does away with this broken "sandbox" mechanism.

[aledbf]

/lgtm

[roboquat]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf, csweichel

Associated issue: #4993

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[roboquat]

LGTM label has been added.

Git tree hash: 55c2db6b078e74437d8a02bf15f1bc1ce4af4879

[aledbf]

[codecov]

Codecov Report

Merging #4994 (0f19525) into main (5b15f69) will increase coverage by 22.99%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           main    #4994       +/-   ##
=========================================
+ Coverage      0   22.99%   +22.99%     
=========================================
  Files         0       11       +11     
  Lines         0     1918     +1918     
=========================================
+ Hits          0      441      +441     
- Misses        0     1418     +1418     
- Partials      0       59       +59     

Flag	Coverage Δ
components-ws-daemon-app	22.99% <ø> (?)

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

Impacted Files	Coverage Δ
components/ws-daemon/pkg/content/service.go	0.00% <ø> (ø)
components/ws-daemon/pkg/content/archive.go	57.47% <0.00%> (ø)
...onents/ws-daemon/pkg/internal/session/workspace.go	50.73% <0.00%> (ø)
components/ws-daemon/pkg/resources/limiter.go	77.77% <0.00%> (ø)
components/ws-daemon/pkg/resources/dispatch.go	0.00% <0.00%> (ø)
components/ws-daemon/pkg/internal/session/store.go	19.38% <0.00%> (ø)
components/ws-daemon/pkg/content/initializer.go	0.00% <0.00%> (ø)
components/ws-daemon/pkg/content/tar.go	45.63% <0.00%> (ø)
components/ws-daemon/pkg/content/config.go	62.50% <0.00%> (ø)
... and 2 more

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