fix(test): rm upgrade

[skrdgraph]

Problem

We don't need an apt upgrade* step here. this is an overkill - plus it's causing some dependency issue on the environment layer. it's also causing a bunch of tests to fail in the installation step - https://github.com/dgraph-io/badger/actions .. we don't have a consistent baseline mostly because of the failing environment setup step.

we should have a tight pinning on our environments. operations like upgrade etc. can induce failures suddenly based on upstream changes.

issue

• https://github.com/dgraph-io/badger/actions/runs/3909870547/jobs/6681427503
• https://github.com/dgraph-io/badger/actions?query=event%3Aschedule

Solution

rm upgrade*

[coveralls]

Coverage: 60.742%. Remained the same when pulling 9454c11 on skrdgraph/fix_dependency into fba305b on main.