**What type of PR is this?**
Bug fix
**What does this PR do? Why is it needed?**
This PR ensures that we set the beacon node options AFTER reading the
config file (if one is given to override the defaults).
**Which issues(s) does this PR fix?**
It fixes the issue that Barnabas reported around the
"MIN_EPOCHS_FOR_DATA_COLUMN_SIDECARS_REQUESTS" override not being
respected (and potentially other issues resulting from setting the
options before reading the config).
Fixes #
**Other notes for review**
**Acknowledgements**
- [x] I have read
[CONTRIBUTING.md](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md).
- [x] I have included a uniquely named [changelog fragment
file](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md#maintaining-changelogmd).
- [x] I have added a description with sufficient context for reviewers
to understand this PR.
- [x] I have tested that my changes work as expected and I added a
testing plan to the PR description (if applicable).
**What type of PR is this?**
> Other
**What does this PR do? Why is it needed?**
**Which issues(s) does this PR fix?**
Follow up to #16311
**Other notes for review**
**Acknowledgements**
- [x] I have read
[CONTRIBUTING.md](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md).
- [x] I have included a uniquely named [changelog fragment
file](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md#maintaining-changelogmd).
- [x] I have added a description with sufficient context for reviewers
to understand this PR.
- [x] I have tested that my changes work as expected and I added a
testing plan to the PR description (if applicable).
