HDDS-14833. Bump GitHub action versions

[adoroszlai]

What changes were proposed in this pull request?

Node.js 20 is deprecated in GitHub runners. Bump GitHub actions versions to the latest ones for Node.js 24 support.

https://issues.apache.org/jira/browse/HDDS-14833

How was this patch tested?

CI:
https://github.com/adoroszlai/ozone/actions/runs/23040978600

Verified that all workflows use the same versions:

$ grep --no-filename 'actions/' .github/workflows/*.* | sed 's/^.*uses: //' | sort -u
actions/cache/restore@v5
actions/cache/save@v5
actions/cache@v5
actions/checkout@v6
actions/download-artifact@v8
actions/setup-java@v5
actions/setup-python@v6
actions/stale@v10
actions/upload-artifact@v7

[sarvekshayr]

Thanks @adoroszlai. I've verified all the action versions.

LGTM.