Convert rock to use snap base

[jardon]

• Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes/features)
• Docs have been added / updated (for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
  Base change

• What is the current behavior? (You can also link to an open issue here)
  All mongodb components are installed from percona-provided deb packages.

• What is the new behavior (if this is a feature change)?
  The rock is now built using the charmed-mongodb snap instead of the official deb packages.

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)
  Yes, you'll likely have to rewrite quite a few things to deal with confinement.

• Other information:
  charmed-mongodb-snap repo

[jardon]

@delgod This PR wont work as-is. I believe for this to be usable I would need to expose an app to run mongod in the foreground. I could create an app called mongod-foreground that doesnt run as a daemon for use with the rock. Any thoughts?

[taurus-forever]

Tnx!

[delgod]

@delgod This PR wont work as-is. I believe for this to be usable I would need to expose an app to run mongod in the foreground. I could create an app called mongod-foreground that doesnt run as a daemon for use with the rock. Any thoughts?

Let's research why it doesn't work, I don't understand the issue, I don't think mongod-foreground needed

[jardon]

The integration tests here are failing because of an incompatibility with cryptography and openssl.

The operator needs to be updated to fix this.

More details can be found here

[jardon]

Here is the associated mongodb-k8s-operator GH Issue.

[jardon]

This is depending on this PR to be merged.

[jardon]

These changes can be tested with 5.0/edge/rework-hooks, but are omitted in the PR.