Support for Restricted Environment

[pranavcracker]

Description

• Currently, if we try to deploy site-manager using helm charts in a restricted environment where it requires cluster admin privileges to create RBAC entities, it is impossible to deploy.

Solution

• Added a new variable "shouldCreateClusterAdminEntities" through helper which will check for "INFRA_RESTRICTED_ENVIRONMENT" variable in valuse and skip the creation of RBAC entities if it's value to be found as "true".
  If "INFRA_RESTRICTED_ENVIRONMENT" is set to false or absent is values then it will honor exiting variable "createClusterAdminEntities" to decide creation of RBAC entities.