Fixes referenced services not being shared when lazy services are cloned before being initialized. Adds tests for both the ghost and proxy scenario's.

This makes the inlining behaviour more conservative, which impacts the outputs of some other test cases.

First commit adds a test, second commit has the fix. Third commit also considers the proxy case, which is also affected. I can squash if necessary.

Targeted 6.4, but this also applies to 7.x.