feat: the consumer username supports hyphens `-`

[AlinsRan]

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Description

Background

At apisix-ingress-controller, We want to isolate resources through k8s namespace, for example, construct such a name namespace_username to differentiate consumers. K8s namespace supports hyphens -, but APISIX consumer username does not support https://github.com/apache/apisix/blob/master/apisix/schema_def.lua#L713.

$ url http://127.0.0.1:9080/apisix/admin/consumers \
 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
 {
     "username": "namespace-1_jack",
     "plugins": {
         "key-auth": {
             "key": "auth-one"
         }
     }
}'
# response
{"error_msg":"invalid configuration: property \"username\" validation failed: failed to match pattern \"^[a-zA-Z0-9_]+$\" with \"namespace-1_jack\""}

[tokers]

If we don't have special considerations about the hyphen symbol, we can support it.

[github-actions[bot]]

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[github-actions[bot]]

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