[ws-manager] Don't nil-deref on timeout computation

[csweichel]

fixes #5011

[aledbf]

/lgtm

[roboquat]

LGTM label has been added.

Git tree hash: 6390f5e17e10c24f408bc8703ec9a8f21b372830

[roboquat]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf

Associated issue: #5011

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• components/ws-manager/OWNERS [aledbf]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[codecov]

Codecov Report

Merging #5013 (22d65fe) into main (4c70e7a) will increase coverage by 36.32%.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##           main    #5013       +/-   ##
=========================================
+ Coverage      0   36.32%   +36.32%     
=========================================
  Files         0       13       +13     
  Lines         0     3749     +3749     
=========================================
+ Hits          0     1362     +1362     
- Misses        0     2272     +2272     
- Partials      0      115      +115     

Flag	Coverage Δ
components-ws-manager-app	36.32% <0.00%> (?)

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

Impacted Files	Coverage Δ
components/ws-manager/pkg/manager/status.go	71.96% <0.00%> (ø)
components/ws-manager/pkg/manager/config.go	32.50% <0.00%> (ø)
components/ws-manager/pkg/manager/imagespec.go	0.00% <0.00%> (ø)
...-manager/pkg/manager/internal/workpool/workpool.go	100.00% <0.00%> (ø)
...s/ws-manager/pkg/manager/internal/grpcpool/pool.go	74.46% <0.00%> (ø)
components/ws-manager/pkg/manager/manager.go	24.89% <0.00%> (ø)
components/ws-manager/pkg/manager/probe.go	0.00% <0.00%> (ø)
components/ws-manager/pkg/manager/create.go	78.79% <0.00%> (ø)
components/ws-manager/pkg/manager/monitor.go	0.00% <0.00%> (ø)
... and 4 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4c70e7a...22d65fe. Read the comment docs.