Bump google-cloud-datastore from 2.7.1 to 2.8.0 in /results-processor (#2926)

Bumps [google-cloud-datastore](https://github.com/googleapis/python-datastore) from 2.7.1 to 2.8.0.
- [Release notes](https://github.com/googleapis/python-datastore/releases)
- [Changelog](https://github.com/googleapis/python-datastore/blob/main/CHANGELOG.md)
- [Commits](googleapis/python-datastore@v2.7.1...v2.8.0)

---
updated-dependencies:
- dependency-name: google-cloud-datastore
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

results-processor/requirements.txt

@@ -32,7 +32,7 @@ google-cloud-core==2.3.1
     # via
     #   google-cloud-datastore
     #   google-cloud-storage
-google-cloud-datastore==2.7.1
+google-cloud-datastore==2.8.0
     # via -r requirements.in
 google-cloud-storage==2.5.0
     # via -r requirements.in