Revert part of #47-Improve global-sidecar request forwarding capabilities

[cywang1905]

In #47 , We have given the global-sidecar component the ability to underwrite disaster recovery. The pod port and service port of global-sidecar correspond to each other. But the addition of this capability pollutes the lazyload previous logic. We decided to make a clearer distinction between the two.

• Normal lazyload traffic goes to the global-sidecar port defined by component.globalSidecar.port in slimeboot, int value, default "80"
• Abnormal disaster recovery traffic goes to the corresponding port in the global-sidecar based on the port of the original request

Other added capabilities of #47 are retained, such as global-sidecar health check ports, logging levels, number of instances, resource quotas, etc. can be configured.

---

在 #47 中，我们赋予了global-sidecar组件灾备兜底的能力。global-sidecar的pod端口和service端口一一对应。但这种能力的添加污染了懒加载原有逻辑。我们决定对二者做更明确的区分。

• 正常的懒加载兜底流量走到slimeboot中component.globalSidecar.port定义的global-sidecar端口，int类型，默认80
• 异常的灾备流量则根据原始请求的端口走到global-sidecar中相应的端口

#47 中其他的新增能力予以保留，比如global-sidecar健康检查端口、日志级别、实例数、资源配额等可配置。

[YonkaFang]

To reduce duplicate code, what do you think about writing it in the following way?

var gsPort = default(80, gs.port)
var hasSidecarPort bool
svcPorts := make([]int, 0, len(wormholePort))
for _, p := range wormholePort {
  svcPorts = append(svcPorts, p)
  if p == gsPort {
    hasSidecarPort = true
  }
}

if !hasSidecarPort {
  svcPorts = append(svcPorts, gsPort)
}

for _, p := range svcPorts {
   // ...

   // gsPort ...

  /// ...
}

[YonkaFang]

then break?

[YonkaFang]

  {{ $hasGsPort := false }}
  {{ $gsSvcPorts := list }}
  {{- range .Values.wormholePort }}
  {{- if eq (int .) (int $.Values.gsPort) }}
  {{ $hasGsPort = true }}
  {{- end -}}
  {{ $gsSvcPorts = append $gsSvcPorts . }}
  {{- end -}}

  {{- if not $hasGsPort }}
  {{ $gsSvcPorts = append $gsSvcPorts .Values.gsPort }}
  {{- end -}}

[cywang1905]

much simpler, changed

[YonkaFang]

does this globalSidecar.port do sth with lazyload.gsPort?