Supports canary routing with multiple values for one query param

[lianglli]

Supports canary routing with multiple values for one query param

[lianglli]

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    nginx.ingress.kubernetes.io/canary: "true"
    nginx.ingress.kubernetes.io/canary-by-query: open3
    nginx.ingress.kubernetes.io/canary-by-query-value: abc1||abc2||abc3||abc4||abc5||abc6||abc7||abc8||abc9||abc10||abc11||abc12||abc13||abc14||abc15||abc16||abc17||abc18||abc19||abc20||abc21
    nginx.ingress.kubernetes.io/ssl-redirect: "true"
  creationTimestamp: "2023-10-31T06:30:31Z"
  generation: 2
  name: tengine-ingress-hello-query-ing
  namespace: default
  resourceVersion: "28152616"
  uid: debebfd0-afd2-4604-af8d-a41ad400bfbc
spec:
  ingressClassName: opensource-ingress
  rules:
  - host: echo.w1.com
    http:
      paths:
      - backend:
          service:
            name: tengine-ingress-hello3-service
            port:
              number: 80
        path: /
        pathType: Prefix
  tls:
  - hosts:
    - echo.w1.com
    secretName: https-server-1
status:
  loadBalancer:
    ingress:
    - {}

默认configmap 配置，"max-canary-query-val-num"允许路由匹配的query参数值个数是20，用户可以通过cm配置按需调整。

	// Max number of query value for canary annotation 'canary-by-query-value'
	MaxCanaryQueryValNum int `json:"max-canary-query-val-num"`

MaxCanaryQueryValNum:         20,

............................................................

$ curl -i -k https://echo.w1.com/?open3=abc20
HTTP/2 301 
server: Tengine/3.1.0
date: Wed, 01 Nov 2023 08:56:10 GMT
location: /?open3=abc20/
strict-transport-security: max-age=0
ups-target-key: default-tengine-ingress-hello3-service-80
x-protocol: HTTP/2.0
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000