Support type cast in group by

[clemvnt]

Hello,

This is the initial step towards supporting type cast in group by.

Related to OData/AspNetCoreOData#1182.

Issues

OData/AspNetCoreOData#1180

Description

For the following group by : groupby((MyAddress/Fully.Qualified.Namespace.HomeAddress/HomeNO))

The response was :

[
  {
    "homeNO": "Value1"
  },
  {
    "homeNO": "Value2"
  }
]

Now, the response is :

[
  {
    "myAddress": {
        "homeNO": "Value1"
    }
  },
  {
    "myAddress": {
        "homeNO": "Value2"
    }
  }
]

Checklist

• Test cases added
• Build and test with one-click build and test script passed

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Total files changed: 2

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.cs : +38 -1

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[clemvnt]

@microsoft-github-policy-service agree

[clemvnt]

Is there something blocking this PR? cc. @corranrogue9