[TC-OPCREDS-3.3 ] Precondition need to be removed

[Rajashreekalmane]

Description:
The current precondition for the TC-OPCREDS-3.3 test case is not necessary for the test's execution and should be removed.

Script Reference :
https://github.com/project-chip/connectedhomeip/blob/master/src/app/tests/suites/certification/Test_TC_OPCREDS_3_3.yaml

Test Plan Reference
https://github.com/CHIP-Specifications/chip-test-plans/blob/master/src/cluster/node_operational_credentials.adoc#tc-opcreds-3-3-attribute-nocs-commands-dut-client

[raul-marquez-csa]

PR
TC-OPCREDS-3.3 - Updates verification steps, removes pre-condition #36211