review-bot: reverted #4271 and added `workflow_dispatch` (#4293)

This PR includes two changes:
- added `workflow_dispatch` to review bot
- reverted #4271

### Added `workflow_dispatch` to review bot
This allows us, in the case that review-bot fails for some fork reasons,
to trigger it manually ensuring that we can overcame the problem with
the multiple actions while we look for a solution.

<img width="342" alt="image"
src="https://github.com/paritytech/polkadot-sdk/assets/8524599/f432f91b-829a-4da4-b4ca-54cc4fe280c8">

### Reverted #4271
Unfortunately, the changes added in #4271 do not work in forks.

Here is a lengthy discussion of many individuals facing the same problem
as me:
- [GitHub Action `pull_request` attribute empty in `workflow_run` event
object for PR from forked repo
#25220](https://github.com/orgs/community/discussions/25220)

So I had to revert it (but I updated the dependencies to latest).

#### Miscellaneous changes

I added a debug log at the end of review bot in case it fails so we can
easily debug it without having to make a lot of boilerplate and forks to
duplicate the environment.