Modified the default value of cilium IPAM and added the support for r…

[biqiangwu]

Signed-off-by: dcwbq biqiang.wu@daocloud.io

What type of PR is this?
/kind feature

What this PR does / why we need it:
cilium IPAM uses "Cluster Scope" mode by default. Also add the parameters required for this mode

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:
cilium Default value in "Cluster Scope" mode

  cluster-pool-ipv4-cidr: 10.0.0.0/8
  cluster-pool-ipv4-mask-size: "26"
  cluster-pool-ipv6-cidr: fd00::/104
  cluster-pool-ipv6-mask-size: "120"

But I think the cluster Pod CIDR is too big, and "kube_pods_subnet" is more reasonable.

Does this PR introduce a user-facing change?:
cilium IPAM default mode changed from "Kubernetes" to "Cluster Scope"

cilium IPAM uses "Cluster Scope" mode by default. Also add the parameters required for this mode

[k8s-ci-robot]

Hi @dcwbq. Thanks for your PR.

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[yankay]

/ok-to-test

[cristicalin]

Thanks @dcwbq !

/approve
/cc @floryut @oomichi

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cristicalin, dcwbq

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[cristicalin]

/retest

[oomichi]

Sorry for missing this pull request in long time.
looks good for me.

/lgtm

[lutskevich]

@oomichi Hi! It has mistakes. fix #9896

[floryut]

wow you are right..

[okaufmann]

@dcwbq Should this not be "{{ kube_pods_subnet | default('10.233.64.0/18') }}" (in case this variable is not set / for backward compability)?