Add jailer bind mounts integration test

[alexandruag]

We should add an integration test to cover similar use cases as those mentioned in #1089. We can use this branch as a starting point, after harmonizing it with the latest version of #1093 (ideally by dropping the cherry picked commit at the end, and rebasing master after it gets merged).

[ShadowCurse]

To re-instantiate the requirements for this issue:
There was a PR #1093 that fixed the bind mounts propagation, but it did not add any tests for the fix. This issue is tracking the addition if such tests. Examples of jailer tests can be found here.