修复manifestEqual方法缺陷

[veraicon]

Pull Request Description

Describe what this PR does / why we need it

修复manifestEqual方法缺陷。
该方法的意图应当是对比来源和目标镜像的manifest，如果相同就skip该任务。但是该方法之前在本地和远程manifest内容实际上完全一致，但是key顺序不同的情况下，会返回false，没有成功比较。
而由于destManifest是本地构造的，因此key顺序大概率与远程不同。
这导致重复向远程仓库提交push；而在远程仓库开启immutable的情况下，会导致任务预期外的失败。

Does this pull request fix one issue?

是的，已测试

Describe how you did it

将简单的json.compact成为无序byte数组的比较，转变成递归的key value逐个值比较，包括slice。

Describe how to verify it

将目标镜像仓库设置immutable，也就是已存在的tag不允许重复提交；此时将来源和目标设置为相同地址进行提交，在原始版本会报错。
unknown: The requested tag already exists and cannot be overwritten
当前提交版本会提示 skip synchronization because destination image exists 并返回成功

Special notes for reviews

[veraicon]

举例来说，根据日志，之前的版本会对比如下两个str，并返回false，实际上他们的内容值是一致的（这里对digest进行了mask）：
{
"mediaType": "application/vnd.docker.distribution.manifest.list.v2+json",
"schemaVersion": 2,
"manifests": [
{
"mediaType": "application/vnd.docker.distribution.manifest.v2+json",
"digest": "sha256:",
"size": 2831,
"platform": {
"architecture": "arm64",
"os": "linux"
}
},
{
"mediaType": "application/vnd.docker.distribution.manifest.v2+json",
"digest": "sha256:",
"size": 2831,
"platform": {
"architecture": "amd64",
"os": "linux"
}
}
]
}

{"schemaVersion":2,"mediaType":"application/vnd.docker.distribution.manifest.list.v2+json","manifests":[{"mediaType":"application/vnd.docker.distribution.manifest.v2+json","size":2831,"digest":"sha256:","platform":{"architecture":"arm64","os":"linux"}},{"mediaType":"application/vnd.docker.distribution.manifest.v2+json","size":2831,"digest":"sha256:","platform":{"architecture":"amd64","os":"linux"}}]}

[denverdino]

        json.Unmarshal(m1, &a)
	json.Unmarshal(m2, &b)

Pls add error check for Unmarshal

And how about to use eq := reflect.DeepEqual(m1, m2)

More options for pkg maps and cmp in Golang 1.21

https://blog.stackademic.com/introducing-new-packages-in-go-maps-and-cmp-2639e64b6a85

[veraicon]

        json.Unmarshal(m1, &a)
	json.Unmarshal(m2, &b)

Pls add error check for Unmarshal

And how about to use eq := reflect.DeepEqual(m1, m2)

More options for pkg maps and cmp in Golang 1.21

https://blog.stackademic.com/introducing-new-packages-in-go-maps-and-cmp-2639e64b6a85

Added unmarshal error handling and replaced custom implementation with deepEqual.
Pls review ,thanks.