Co-authored-by: tj-actions[bot] <109116665+tj-actions-bot@users.noreply.github.com>

- Addition of `ACTION_INPUT_DEFAULTS` object in `constant.ts` including default settings.
- Made changes in `utils.ts` replacing `actionInputs` references with the newly added `ACTION_INPUT_DEFAULTS`.

- Removed imports for the `fs` module and `path` from the `utils.test.ts` file
- Deleted the `actionPath` argument from the `warnUnsupportedRESTAPIInputs` function in `utils.test.ts`
- All tests related to YAML errors in the action file have been removed from `utils.test.ts`
- Removed the `UNSUPPORTED_REST_API_INPUTS` constant from the `constant.ts` file and replaced it with a `Partial` type within the `UNSUPPORTED_REST_API_INPUTS` export
- The file `utils.ts` has been updated to reflect the changes in `constant.ts`. It now iterates over `Object.keys(UNSUPPORTED_REST_API_INPUTS)`, substitutes `UNSUPPORTED_REST_API_INPUTS` for `ACTION_INPUT_DEFAULTS`, and uses type casting in condition checking.

- Remove the conditional checking for `GITHUB_ACTION_PATH` before calling `warnUnsupportedRESTAPIInputs`
- Change in procedure for getting changed files from the REST API.

…function

- Change the way key is referenced in the `warnUnsupportedRESTAPIInputs` function in `utils.ts` to use `snakeCase` only at the point of warning message generation.

- Remove the `sha` parameter from the `.github/workflows/multi-job-test.yml` file
- Add an expectation to check if `coreWarningSpy` is called once in `utils.test.ts`