add baidu cloud provider information

[m3ngyang]

Add details about cloud provider node name computation and internal LoadBalancer annotation of Baidu cloud.

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[m3ngyang]

I've signed the CLA.

[m3ngyang]

/assign @kbarnard10

[hello2mao]

I've signed the CLA.

@m3ngyang Maybe you're using a different email address when signing the CLA. -_-

[m3ngyang]

/check-cla

[Rajakavitha1]

Checked the updates on: https://deploy-preview-12738--kubernetes-io-master-staging.netlify.com/docs/concepts/cluster-administration/cloud-providers/
and
https://deploy-preview-12738--kubernetes-io-master-staging.netlify.com/docs/concepts/services-networking/service/

nit: Should there be a space between Baidu and Cloud in the tab that reads BaiduCloud?

[m3ngyang]

@Rajakavitha1 thanks for your review, "Baidu Cloud" is better.

[Rajakavitha1]

Checked the updates on: https://deploy-preview-12738--kubernetes-io-master-staging.netlify.com/docs/concepts/cluster-administration/cloud-providers/
and
https://deploy-preview-12738--kubernetes-io-master-staging.netlify.com/docs/concepts/services-networking/service/

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Rajakavitha1

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