fix: list all DevWorkspaces, handle inaccessible templates gracefully (CRW-11897)

[adietish]

fixes https://redhat.atlassian.net/browse/CRW-11897

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 42.55319% with 162 lines in your changes missing coverage. Please review.
✅ Project coverage is 35.86%. Comparing base (71098f6) to head (72e0956).
⚠️ Report is 414 commits behind head on main.

Files with missing lines	Patch %	Lines
.../gateway/view/steps/DevSpacesWorkspacesStepView.kt	0.00%	99 Missing ⚠️
...edhat/devtools/gateway/openshift/PodExecSession.kt	61.46%	31 Missing and 11 partials ⚠️
.../redhat/devtools/gateway/server/RemoteIDEServer.kt	50.00%	7 Missing and 2 partials ⚠️
...hat/devtools/gateway/openshift/DevWorkspacePods.kt	72.22%	0 Missing and 5 partials ⚠️
...hat/devtools/gateway/devworkspace/DevWorkspaces.kt	88.23%	3 Missing and 1 partial ⚠️
...com/redhat/devtools/gateway/DevSpacesConnection.kt	0.00%	1 Missing ⚠️
...at/devtools/gateway/openshift/ApiExceptionUtils.kt	0.00%	0 Missing and 1 partial ⚠️
...com/redhat/devtools/gateway/util/ExceptionUtils.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            main     #359       +/-   ##
==========================================
+ Coverage   0.00%   35.86%   +35.86%     
==========================================
  Files          4      114      +110     
  Lines         26     4960     +4934     
  Branches       0      955      +955     
==========================================
+ Hits           0     1779     +1779     
- Misses        26     2927     +2901     
- Partials       0      254      +254     

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