Bump github.com/smartcontractkit/chainlink-testing-framework/framework from 0.16.6-0.20260708113039-95f97b2d25e9 to 0.16.6 in /system-tests/tests

Bump github.com/smartcontractkit/chainlink-testing-framework/framework from 0.16.6-0.20260708113039-95f97b2d25e9 to 0.16.6 in /system-tests/tests #49967