Update github actions & lint

[RanbirAulakh]

Description of changes:

• Restructure the workflows. There are 2 workflows:
  • osml-model-runner-test-build
    • This workflow will be executed only IF the pull request have been made to dev or main branch.
  • osml-model-runner-test-publish
    • This workflow will be executed only IF the changes have been merged into main branch. It will build and then push documentation pages to gh-pages branch
• Eliminate all commits id for github actions and used stable version of it
• Lint the files so Github Action can succeed

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[drduhe]

LGTM