Bump go.opentelemetry.io/collector/featuregate from 1.25.0 to 1.26.0 #9779

Job	Run time
e2e-tests (1.23, e2e)	1m 23s
e2e-tests (1.23, e2e-automatic-rbac)	1m 28s
e2e-tests (1.23, e2e-autoscale)	1m 22s
e2e-tests (1.23, e2e-instrumentation)	1m 22s
e2e-tests (1.23, e2e-opampbridge)	1m 26s
e2e-tests (1.23, e2e-pdb)	1m 22s
e2e-tests (1.23, e2e-prometheuscr)	1m 22s
e2e-tests (1.23, e2e-targetallocator)	1m 20s
e2e-tests (1.23, e2e-targetallocator-cr)	1m 22s
e2e-tests (1.23, e2e-upgrade)	1m 22s
e2e-tests (1.23, e2e-multi-instrumentation)	1m 22s
e2e-tests (1.23, e2e-metadata-filters)	1m 21s
e2e-tests (1.23, e2e-ta-collector-mtls)	1m 27s
e2e-tests (1.32, e2e)	1m 26s
e2e-tests (1.32, e2e-automatic-rbac)	1m 20s
e2e-tests (1.32, e2e-autoscale)	1m 22s
e2e-tests (1.32, e2e-instrumentation)	1m 20s
e2e-tests (1.32, e2e-opampbridge)	1m 20s
e2e-tests (1.32, e2e-pdb)	1m 19s
e2e-tests (1.32, e2e-prometheuscr)	1m 21s
e2e-tests (1.32, e2e-targetallocator)	1m 21s
e2e-tests (1.32, e2e-targetallocator-cr)	1m 21s
e2e-tests (1.32, e2e-upgrade)	1m 19s
e2e-tests (1.32, e2e-multi-instrumentation)	1m 20s
e2e-tests (1.32, e2e-metadata-filters)	1m 21s
e2e-tests (1.32, e2e-ta-collector-mtls)	1m 21s
e2e-tests (e2e-native-sidecar, 1.29, add-operator-arg OPERATOR_ARG='--feature-gates=operator.side...	1m 21s
e2e-tests-check	1s
	36m 52s

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