Fix unconfigurable onegent classic privileged container

[chrismuellner]

Description

classicFullStack does not require privileged container in call cases. By default it should use capabilities, only when the feature flag is set the container is privileged.

How can this be tested?

Deploy oneagent with the following configurations:

• without privileged oneagent feature flag: oneagent security context should use capabiilties
• with privileged oneagent feature flag: oneagent security context should be privileged

Checklist

• Unit tests have been updated/added
• PR is labeled accordingly
• I have read and understood the contribution guidelines