chore: Remove TypeScript DTO maven plugin and typescript-dto module

[vinokurig]

What does this PR do?

This change removes the obsolete TypeScript DTO generation infrastructure which is no longer needed in the modernized che-server codebase.

Screenshot/screencast of this PR

What issues does this PR fix or reference?

fixes eclipse-che/che#23860

How to test this PR?

N/A

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
• 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

Release Notes

Reviewers

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

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: vinokurig

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[github-actions]

Docker image build succeeded: quay.io/eclipse/che-server:pr-1024

kubectl patch command

kubectl patch -n eclipse-che "checluster/eclipse-che" --type=json -p="[{"op": "replace", "path": "/spec/components/cheServer/deployment", "value": {containers: [{image: "quay.io/eclipse/che-server:pr-1024", name: che}]}}]"

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[vinokurig]

/retest

[vinokurig]

/retest

[openshift-ci]

@vinokurig: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/v19-gitlab-with-pat-setup-flow	6f87047	link	true	/test v19-gitlab-with-pat-setup-flow

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