Upgrade snap base to core22

[farshidtz]

Upgrade the snap base to core22 and replace the deprecated environment variables.

[MonicaisHer]

The snap testing doesn't catch the max retries error from device-virtual:

    config.go:237: Time out: reached max 10 retries.
    exec.go:19: [exec] (sudo journalctl --since "2023-05-11 16:06:18" --no-pager | grep "edgex-device-virtual"|| true) > edgex-device-virtual.log
Wrote snap logs to /home/runner/work/_actions/canonical/edgex-snap-testing/v3/test/suites/edgex-config-provider/edgex-device-virtual.log
    exec.go:19: [exec] sudo snap remove --purge edgex-device-virtual
    exec.go:101: [stdout] edgex-device-virtual removed
--- PASS: TestConfigProvider (28.63s)
    --- PASS: TestConfigProvider/device-virtual (28.63s)

May 11 16:06:32 fv-az268-845 edgex-device-virtual.device-virtual[5247]: level=ERROR ts=2023-05-11T16:06:32.569694095Z app=device-virtual source=init.go:95 msg="Failed to load devices: request failed, status code: 400, err: {\"apiVersion\":\"v3\",\"message\":\"AddDeviceRequest.Device.AutoEvents[0].Interval field is required; AddDeviceRequest.Device.AutoEvents[0].SourceName field is required\",\"statusCode\":400}\n"

An issue has been opened: canonical/edgex-snap-testing#206

[farshidtz]

Rebased to include config file changes.

[MonicaisHer]

Thank you, the test has now passed.