Update dependency quay.io/tigera/operator to v1.27.6

This MR contains the following updates:

Package	Type	Update	Change
quay.io/tigera/operator	ironbank-docker	patch	v1.27.5 -> v1.27.6
quay.io/tigera/operator		patch	v1.27.5 -> v1.27.6
quay.io/tigera/operator	stage	patch	v1.27.5 -> v1.27.6

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