CNF-21106: release-4.21: OpenShift only: Add missing dualStackAddressFamily to bgppeers

[andreaskaris]

The downstream bundle was missing this critical new parameter. Given that disableMP is completely ignored now by both FRRK8s and by metallb's built-in FRR, and given that dualStackAddressFamily always defaults to false, dualStack AF setups were no longer possible in OpenShift. Adding the parameter to the CRD fixes this issue.

Reported-at: https://issues.redhat.com/browse/CNF-21106

(cherry picked from commit e6eee2d)

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[openshift-ci-robot]

@andreaskaris: This pull request references CNF-21106 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the bug to target the "4.21.0" version, but no target version was set.

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In response to this:

The downstream bundle was missing this critical new parameter. Given that disableMP is completely ignored now by both FRRK8s and by metallb's built-in FRR, and given that dualStackAddressFamily always defaults to false, dualStack AF setups were no longer possible in OpenShift. Adding the parameter to the CRD fixes this issue.

Reported-at: https://issues.redhat.com/browse/CNF-21106

(cherry picked from commit e6eee2d)

Is this a BUG FIX or a FEATURE ?:

/kind bug

Uncomment only one, leave it on its own line:

/kind bug
/kind cleanup
/kind feature
/kind design
/kind flake
/kind failing
/kind documentation
/kind regression

What this PR does / why we need it:

Special notes for your reviewer:

Release note:

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