fix: fix tag for keyAuth field

[fengxsong]

Type of change:

• Bugfix
• New feature provided
• Improve performance
• Backport patches

What this PR does / why we need it:

I'm currently doing some work to migrate kong's configuration to apisixroute, when marshaling github.com/apache/apisix-ingress-controller/pkg/kube/apisix/apis/config/v2beta3.ApisixRoute object, the output of keyAuth field is keyauth.
So when I applied the generated manifests to apiserver, action failed because of CRD's Scheme verification.

Pre-submission checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first

[tao12345666333]

LGTM

Thanks!

[tao12345666333]

test/e2e/suite-features/consumer.go
270:  name: keyauth
274:                    assert.Nil(ginkgo.GinkgoT(), s.CreateResourceFromString(secret), "creating keyauth secret for ApisixConsumer")
275:                    assert.Nil(ginkgo.GinkgoT(), s.ApisixConsumerKeyAuthSecretCreated("keyvalue", "keyauth"), "creating keyAuth ApisixConsumer")

Although it doesn't matter, can you update all of the above together?

[tao12345666333]

let's move forward.