fix(github): drop workflows (#3879)

Drop the Default PR to Draft and Mark Ready When Ready workflows.

Due to us using pull_request_target since we accept PRs from forks, our
default GITHUB_TOKEN doesn't have the permissions needed to make changes
to the PRs (set to draft, add labels, etc).

We are working on this but will remove these for now until fixed.

Signed-off-by: jmeridth <[email protected]>

Author: jmeridth

.github/workflows/default-pr-to-draft.yaml

@@ -7,7 +7,7 @@ Argo Helm is a collection of **community maintained** charts. Therefore we rely
 All submissions, including submissions by project members, require review. We use GitHub pull requests for this purpose. Consult [GitHub Help](https://help.github.com/articles/about-pull-requests/) for more information on using pull requests. See the above stated requirements for PR on this project.
 
 > **Note**
-> Please start your pull request in draft mode and add the `Mark Ready When Ready` label to your PR. This will transition your PR automatically to ready when all of the checks have passed. This allows you to iterate on your PR if failures occur without notifying maintainers to review it until it is ready. Thank you for your understanding and cooperation.
+> Please start your pull request in draft mode until all checks pass. This allows you to iterate on your PR if failures occur without notifying maintainers to review it until it is ready. Thank you for your understanding and cooperation.
 
 ### Pull Request Title Linting