[e2g] Adding proper health-check

[chifu1234]

Describe the bug
e2g has only a basic tcp probe. Adding proper health-check like this: OPTIONS icap://127.0.0.1:1344/request ICAP/1.0

Version of Helm and Kubernetes:

Helm Version: **Kubernetes Version**:

Which chart:

[bedag/e2g ]

What happened:

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know: