Convert the Device Labels value from string to string slice

[Felix Ting]

🐞 Bug Report

Affected Services [REQUIRED]

The issue is located in: device-sdk-go

Is this a regression?

Yes, the previous version in which this bug was not present was: ....

Description and Minimal Reproduction [REQUIRED]

Device labels are stored as a single string in the Configuration Provider, we need to convert it to a slice of strings.
The decision to do the conversion in sdk is based on the fact that we can only modify the logic inside the decoding function of the Keeper client. Unless we opt to develop a new decoder for Consul ourselves.
See:
Keeper client https://github.com/edgexfoundry/go-mod-configuration/blob/2c3512b731558a2be3f8460c3f0fed9361b5dcd4/internal/pkg/keeper/client.go#L163
Consul client https://github.com/edgexfoundry/go-mod-configuration/blob/2c3512b731558a2be3f8460c3f0fed9361b5dcd4/internal/pkg/consul/client.go#L206

Minimal Reproduction:

1. Run Napa non-secure stack compose file
2. Query all device services: http://localhost:59881/api/v3/deviceservice/all

🔥 Exception or Error

Actual Result:
{
    "apiVersion": "v3",
    "statusCode": 200,
    "totalCount": 2,
    "services": [
        {
            "created": 1714028539826,
            "modified": 1714028539826,
            "id": "f4723958-3c7a-4eea-a384-c1ac77490b80",
            "name": "device-virtual",
            "labels": [
                "[]"
            ],
            "baseAddress": "http://edgex-device-virtual:59900",
            "adminState": "UNLOCKED"
        },
        {
            "created": 1714028539824,
            "modified": 1714028539824,
            "id": "45e07fe7-7fe8-4116-b32b-84f788cfd361",
            "name": "device-rest",
            "labels": [
                "[]"
            ],
            "baseAddress": "http://edgex-device-rest:59986",
            "adminState": "UNLOCKED"
        }
    ]
}

Expected Result:
{
    "apiVersion": "v3",
    "statusCode": 200,
    "totalCount": 2,
    "services": [
        {
            "created": 1714028539826,
            "modified": 1714028539826,
            "id": "f4723958-3c7a-4eea-a384-c1ac77490b80",
            "name": "device-virtual",
            "baseAddress": "http://edgex-device-virtual:59900",
            "adminState": "UNLOCKED"
        },
        {
            "created": 1714028539824,
            "modified": 1714028539824,
            "id": "45e07fe7-7fe8-4116-b32b-84f788cfd361",
            "name": "device-rest",
            "baseAddress": "http://edgex-device-rest:59986",
            "adminState": "UNLOCKED"
        }
    ]
}

🌍 Your Environment

Deployment Environment:

EdgeX Version [REQUIRED]: Napa

Anything else relevant?