Adjust SCCs for each POD when deploying attestation operator in OpenShift

[sarroutbi]

As discussed in #33, Security Context Constraints (AKA SCCs) should be fined tuned for each of the PODs when deploying attestation operator in OpenShift.

Why? the reason for that boils down to regulations/compliance in a lot of companies that prohibit the use of already existing SCCs (such as anyuid, which is the one being used currently for OpenShift deployment). However, companies are fine if there are dedicated SCCs for the specific use-cases that also must not be used for anything else.