SyncWindow should allow to have multiple sync windows which has same kind,schedule,duration

[keyolk]

Checklist:

• I've searched in the docs and FAQ for my answer: https://bit.ly/argocd-faq.
• I've included steps to reproduce the bug.
• I've pasted the output of argocd version.

Describe the bug

Currently, it does not allow having multiple sync windows which have same kind+schedule+duration combination
Let's say I want to have sync windows like the below

[
  {
    "kind": "allow",
    "schedule": "0 0 * * *",
    "duration": "6h",
    "applications": [
      "two*"
    ],
    "timeZone": "Asia/Seoul"
  },
  {
    "kind": "allow",
    "schedule": "0 0 * * *",
    "duration": "9h",
    "applications": [
      "one*"
    ],
    "timeZone": "Asia/Seoul"
  },
...

It would stuck at project validation step at
https://github.com/argoproj/argo-cd/blob/master/pkg/apis/application/v1alpha1/app_project_types.go#L261

We can mitigate this by just splits it by minutes, but hope it been resolved to make it simple to manage.

To Reproduce

Just create multiple sync windows having the same kind+schedule+duration

Expected behavior

Allow to have multiple time duplicated sync windows

Version

argocd: v2.11.1+9f40df0
  BuildDate: 2024-05-21T22:43:41Z
  GitCommit: 9f40df0c29eca7e45a73f802f033dfd1ed0068e3
  GitTreeState: clean
  GoVersion: go1.22.3
  Compiler: gc
  Platform: darwin/amd64
argocd-server: v2.11.5+c4b283c
  BuildDate: 2024-07-15T17:39:54Z
  GitCommit: c4b283ce0c092aeda00c78ae7b3b2d3b28e7feec
  GitTreeState: clean
  GoVersion: go1.21.10
  Compiler: gc
  Platform: linux/arm64
  Kustomize Version: v5.2.1 2023-10-19T20:13:51Z
  Helm Version: v3.14.4+g81c902a
  Kubectl Version: v0.26.11
  Jsonnet Version: v0.20.0