Secure the Controller by avoiding privilege escalation issue

**Which component**:
Controller

**Is your feature request related to a problem? Please describe.**
There are some Privilege Escalation issues in the Controller
See vulnerability IDs in the vulnerability database : https://avd.aquasec.com
KSV001, KS020, KS021

**Describe the solution you'd like**
You should add these statements in the securityContext :
allowPrivilegeEscalation: false
runAsUser: UID
runAsGroup: GID

Here the UID and GID assigned should be greater than 10 000

**Describe alternatives you've considered**
No Alternative solution.

**Additional context**
None.