fix: eliminating 'MAINTENANCE_OPERATOR_<xxx>' envs if 'useRequestor' is false

[heyvister1]

Users should not see the following env variables, under network-operator pod, in case useRequestor=false

            - name: MAINTENANCE_OPERATOR_ENABLED
              value: "false"
            - name: MAINTENANCE_OPERATOR_REQUESTOR_ID
              value: nvidia.network-operator-driver-upgrade-controller
            - name: MAINTENANCE_OPERATOR_NODE_MAINTENANCE_PREFIX
              value: network-operator
            - name: MAINTENANCE_OPERATOR_REQUESTOR_NAMESPACE
              value: default

[coveralls]

Pull Request Test Coverage Report for Build 19031303641

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 23 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.3%) to 61.697%

---

Files with Coverage Reduction	New Missed Lines	%
controllers/macvlannetwork_controller.go	2	86.25%
controllers/drain_controller.go	4	74.63%
pkg/state/state_skel.go	4	83.82%
controllers/nicclusterpolicy_controller.go	13	76.28%

Totals
Change from base Build 19009765267:	-0.3%
Covered Lines:	4109
Relevant Lines:	6660

---

💛 - Coveralls