Update release TypeScript models script

[schultzp2020]

Which area/kind this issue is related to?
/area api
/area registry

Issue Description

Currently the workflow release-typescript-models releases TypeScript models only for the latest version of the devfile spec. As a consumer of devfiles, it would be nice to have TypeScript model support for all releases of the devfile spec, as well as TypeScript model support for the REST API responses.

Possible solutions

1. Generate an OpenAPI JSON (soon to be a complete superset of JSON schema - 90% there and in our case it shouldn't matter) either by converting the preexisting JSON schema or use swaggest/rest. Then convert to TypeScript models by openapi-typescript.
2. Use typescriptify-golang-structs on Go source code to generate TypeScript models.

Method 1 is preferred because it can be extended to easily test the API responses.

[schultzp2020]

@sleshchenko, @JPinkney, @l0rd do we still need to keep type support for devworkspace inside of the @devfile/api npm package?

[l0rd]

@benoitf @azatsarynnyy do we use the @devfile/api npm package in our editors?
@schultzp2020 FYI @sleshchenko and @JPinkney has left Red Hat and are not working on Devfile/DevWorkspaces anymore.

[benoitf]

yes we are using it in dashboard and in the "libraries" to enhance devfiles (theia and vscode)

[l0rd]

@schultzp2020 we still do need the DevWorkspace type support

[schultzp2020]

Sounds good, I'll keep them included when I add the other types.

[github-actions]

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