build-image-v1.2.0

[longwuyuan]

What this PR does / why we need it:

• Preparing to release v1.2.0 so changed tag to v1.2.0

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation only

Which issue/s this PR fixes

No Issue created because easier

How Has This Been Tested?

• Will be tested in CI and new image(s) will show up on staging registry

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added tests to cover my changes.
• All new and existing tests passed.

[k8s-ci-robot]

@longwuyuan: This issue is currently awaiting triage.

If Ingress contributors determines this is a relevant issue, they will accept it by applying the triage/accepted label and provide further guidance.

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[longwuyuan]

/assign @rikatz
@strongjz @tao12345666333

[rikatz]

/lgtm
/approve
Tks

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: longwuyuan, rikatz

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• OWNERS [rikatz]

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