[occm] add tag on floating ip create

[lidongshengxdayu]

What this PR does / why we need it:

In some scenarios, tags are used as resource tags, but occm creates a floating ip without a tag. This PR adds the same tag as the LB when the floating ip created.

Add tag same as LB for floating ip create

[linux-foundation-easycla[bot]]

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• :white_check_mark: login: lidongshengxdayu (d28309fc6a46963060ebf0f1a0e54e169cd0d490, 9180e6d8a55de28620c50b6058c41cf4f116e9bc, a7a5daf72e372942dbb7734585273afda4daff91, 4319a8865044175ea772f0d2fb143e18537d0fae, 0e29ff21c599c3c9fb12bb275b4307766ccde987)

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[dulek]

/ok-to-test

[dulek]

This looks like a sane request to be able to tag the FIPs created by CCM. This needs to handle one more case though:

loadbalancer.openstack.org/keep-floatingip annotation will force CCM to not delete the FIP. In such two cases we should untag the FIP.

While you're on this, be informed that a bunch of other folks are working on resource tagging, @stephenfin and @dd-georgiev.

[lidongshengxdayu]

This is still not untagging FIPs we don't delete properly.

it mean that you need to untag it when cancel the association?

[dulek]

See this comment for details: https://github.com/kubernetes/cloud-provider-openstack/pull/2577#issuecomment-2075394150