Follows #28695
Now that the action has run successfully in debug mode
([logs](https://github.com/facebook/react/actions/runs/8532177618/job/23372921455#step:2:35)),
let's enable it to persist changes.
Also changes the number of operations per run from the default of 30 to
100 since we have a large backlog of issues and PRs to work through.
Finally adds enhancement label as exempt from stale.
## Summary
This repo uses [Stalebot](https://github.com/probot/stale) to manage
stale Issues and PRs. Stalebot hasn't been maintained for a couple of
years and is officially archived. The number of open Issues and PRs has
increased rapidly since early 2022. Some of this looks like issues with
Stalebot reliability where labels were not applied or close actions were
not taken even when meeting the criteria in the config.
In order to make it easier for maintainers to spend time on current
Issues and PRs, let's upgrade to the Github Stale Action. For now this
PR applies the same config to the new action but we can iterate on it as
needed. The goal is to clean up abandoned and no-longer-relevant
submissions, not to close Issues that describe active bugs or feedback.
## How did you test this change?
Added `debug-only: 'true'` to this PR so we can run the action and
review the logs before allowing the action to run on schedule. We may
see a large amount of label changes and close actions on the first run
as the action clears out previously ignored stale submissions.
