AQL query search support for key value pair for a key in build info

Detailed description: 

For the below build info, we can search using JFrog AQL
'items.find({"@prop1" : {"$eq" : "key1"}})'

{
"version": "1.0.1",
"name": "jfrog-test",
"number": "16964",
"prop1": "key1"
}

The feature request for:
Support for searching if the build-info has a key-value pair for a key. In the below example

we want to retrieve all the artifacts for which the VCS url is https://github.com/myaccount/test.git

{
"version": "1.0.1",
"name": "jfrog-test",
"number": "16964",
"prop1": "key1",
"vcs": [
  {
  "key2": "value2",
  "url": "https://github.com/myaccount/test.git"
  }
 ]
}