chore: Update DevWorkspace Operator dependency to v0.12.2

[amisevsk]

What does this PR do?

• Update DWO to v0.12.2
• Update Che RoutingSolver to accomodate changes from Remove dependency between devworkspacerouting and devfile api devfile/devworkspace-operator#706

Screenshot/screencast of this PR

N/A

What issues does this PR fix or reference?

Closes eclipse-che/che#21039

How to test this PR?

1. Deploy Che Operator with DevWorkspaces enabled
2. Create a Devfile 2.0 workspace
3. Stop the Devfile 2.0 workspace
4. Delete the workspace
5. Verify that DevWorkspace resource on cluster is removed, and that finalizer on DevWorkspaceRouting is cleared

PR Checklist

As the author of this Pull Request I made sure that:

• The Eclipse Contributor Agreement is valid
• Code produced is complete
• Code builds without errors
• Tests are covering the bugfix
• Custom resource definition file is up to date
• OLM bundles are up to date
• The repository devfile is up to date and works
• Sections What issues does this PR fix or reference and How to test this PR completed
• Relevant user documentation updated
• Relevant contributing documentation updated
• CI/CD changes implemented, documented and communicated

Reviewers

Reviewers, please comment how you tested the PR when approving it.

[tolusha]

I've updated resources, but tests fail with a error message

# github.com/devfile/devworkspace-operator/pkg/infrastructure
/home/tolusha/gocode/src/github.com/eclipse-che/che-operator/vendor/github.com/devfile/devworkspace-operator/pkg/infrastructure/namespace.go:32:18: undefined: os.ReadFile
FAIL	github.com/eclipse-che/che-operator/controllers/devworkspace/solver [build failed]
FAIL

go version
go version go1.15.12 linux/amd64

[amisevsk]

but tests fail with a error message

Go 1.16 is required for building DWO (see https://go.dev/doc/go1.16#ioutil). 1.16.12 is currently used in the docker build.

The Go 1.16 requirement was added in devfile/devworkspace-operator#705, in order to support devfile/devworkspace-operator#700 and to allow updating some other tools used (e.g. addlicense)

[tolusha]

/retest

[codecov]

Codecov Report

Merging #1302 (5b81a4c) into main (f021aad) will not change coverage.
The diff coverage is 33.33%.

@@           Coverage Diff           @@
##             main    #1302   +/-   ##
=======================================
  Coverage   59.75%   59.75%           
=======================================
  Files          78       78           
  Lines        6353     6353           
=======================================
  Hits         3796     3796           
  Misses       2180     2180           
  Partials      377      377           

Impacted Files	Coverage Δ
controllers/devworkspace/solver/che_routing.go	77.49% <33.33%> (ø)

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: amisevsk, tolusha

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