Remove "Manufacturer" from PCIeDevice interface

Remove Manufacturer from the PCIeDevice's PCIeInterface and fix the
following Redfish validator error:
ERROR - Manufacturer not defined in Complex PCIeInterface
PCIeDevice.v1_3_0.PCIeInterface (check version, spelling and casing)

This error is because there is no ["PCIeInterface"]["Manufacturer"] at
https://redfish.dmtf.org/schemas/v1/PCIeDevice.v1_11_0.json.

"Manufacturer" is already part of the root PCIeDevice and is
implemented on line 219.

On the backend "Manufacturer" is already part of Asset interface so
remove it from PCIeDevice interface in peci-pcie and
phosphor-dbus-interface.

phosphor-dbus-interfaces commit:
https://gerrit.openbmc.org/c/openbmc/phosphor-dbus-interfaces/+/61738

peci-pcie commit:
https://gerrit.openbmc.org/c/openbmc/peci-pcie/+/62256

Tested:
```
curl -k https://$bmc/redfish/v1/Systems/system/PCIeDevices/pcie_card10


{
  "@odata.id": "/redfish/v1/Systems/system/PCIeDevices/pcie_card10",
  "@odata.type": "#PCIeDevice.v1_9_0.PCIeDevice",
  "Id": "pcie_card10",
  "Manufacturer": "",
  "Model": "6B87",
  "Name": "PCIe Device",
  "PCIeFunctions": {
    "@odata.id": "/redfish/v1/Systems/system/PCIeDevices/pcie_card10/PCIeFunctions"
  },
  "PCIeInterface": {
    "LanesInUse": 16,
    "PCIeType": "Gen4"
  },
  "PartNumber": "03FL204",
  "SerialNumber": "YA31UF07200Z",
  "Slot": {
    "Location": {
      "PartLocation": {
        "ServiceLabel": "U78DA.ND0.WZS003T-P0-C10"
      }
    }
  },
  "SparePartNumber": "03FL205"
}
```

Change-Id: I860bf60f6fa3cc5d6b57f945d781e7dcafc17d7f
Signed-off-by: Lakshmi Yadlapati <lakshmiy@us.ibm.com>