Update azure with az command

[oomichi]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

As the download page1, the command name is "az", not "azure".
This replaces "azure" command with "az" command for fixing it.
In addition, "az account list-locations" is correct command line to know available location as 2.

Does this PR introduce a user-facing change?:

NONE

[floryut]

/ok-to-test
/lgtm

[Miouge1]

Since it's a doc change and markdownlint is green, we can skip CI.

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Miouge1, oomichi

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files:

• OWNERS [Miouge1]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[oomichi]

/retest

[oomichi]

I am checking the related code for MS Azure, and I found the following code in ./contrib/azurerm/apply-rg.sh

if az &>/dev/null; then
    echo "azure cli 2.0 found, using it instead of 1.0"
    ./apply-rg_2.sh "$AZURE_RESOURCE_GROUP"
elif azure &>/dev/null; then
    ansible-playbook generate-templates.yml

    azure group deployment create -f ./.generated/network.json -g $AZURE_RESOURCE_GROUP
    azure group deployment create -f ./.generated/storage.json -g $AZURE_RESOURCE_GROUP

The above code seems to expect azure command as version 1.0 instead of version 2.0 of az command. So it is better to take time for this PR before merging.

/hold

[oomichi]

I submitted #6045 for version 2 of azure command.
After the issue, I guess we can cancel this /hold.

[oomichi]

I found the code for version 2 of azure command.
It is fine to unlock this.

/retest
/hold cancel

[oomichi]

To re-trigger test jobs.