[metallb] add config option for IPAddressPool avoidBuggyIPs

[zeeZ]

• Add avoid_buggy_ips as optional
• Revert avoid_buggy_ips default back to false
• Change auto_assign to optional, default true

What type of PR is this?
/kind bug

What this PR does / why we need it: Brings back the option to configure MetalLB IPAddressPool avoidBuggyIPs and changes the defaults to match with MetalLB defaults.

Which issue(s) this PR fixes:

Fixes #10457

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[metallb] Add option to set avoidBuggyIPs in IPAddressPools and change the default back to false

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[yankay]

/ok-to-test

[floryut]

@zeeZ Thank you

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: floryut, zeeZ

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[yankay]

Thanks @zeeZ
/lgtm