build(snap): Upgrade snap base to core22, upgrade env file loading logic

[MonicaisHer]

This PR upgrades the snap base from core20 to core22, and also upgrades env file loading logic to incorporate the following fixes:

• Move env file to parent directory to avoid conflict with config provider canonical/edgex-snap-hooks#83
• Add snapctl wrapper to check connected interfaces canonical/edgex-snap-hooks#82

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[codecov-commenter]

Codecov Report

Merging #4530 (8449c7e) into main (5776811) will not change coverage.
The diff coverage is n/a.

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  Coverage   41.54%   41.54%           
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  Files         106      106           
  Lines        9764     9764           
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  Hits         4056     4056           
  Misses       5362     5362           
  Partials      346      346           

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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[farshidtz]

I did a few manual tests for user creation and TLS certificate replacements and they work too.

Thanks!

[farshidtz]

I just realized that this has causes a regression because the additional ACL roles, set via the EDGEX_ADD_REGISTRY_ACL_ROLES env var are no longer passed to the security bootstrapper.

All external services that don't have the ACL role by default (device virtual, device-rest) fail with a similar error:
level=ERROR ts=2023-05-07T03:08:18.937346124Z app=device-mqtt source=bootstrap.go:48 msg="failed to create provider for all-services: failed to get Configuration Provider (consul) access token: HTTP response with status code 400, message: failed to generate Consul token using [device-mqtt]: {\"errors\":[\"role \\\"device-mqtt\\\" not found\"]}\n"

The env file gets generated locally:

$ sudo cat /var/snap/edgexfoundry/current/config/security-bootstrapper/overrides.env 
# Sys-gen env vars from snap options:
EDGEX_ADD_REGISTRY_ACL_ROLES="app-functional-tests,app-rules-engine,app-http-export,app-mqtt-export,app-external-mqtt-trigger,app-push-to-core,app-rfid-llrp-inventory,application-service,device-camera,device-mqtt,device-modbus,device-coap,device-snmp,device-gpio,device-bacnet,device-grove,device-uart,device-rfid-llrp,device-usb-camera,device-onvif-camera,edgex-ekuiper"

But it isn't sourced before starting the service. See inline comments.

[farshidtz]

This removes the possibility of passing $ENV_FILE from outside. The security-consul-bootstrapper and security-bootstrapper-redis apps use a different path, set inside the snapcraft.yaml file.

[farshidtz]

ENV_FILE should be changed to $SNAP_DATA/config/security-bootstrapper/overrides.env

[farshidtz]

ENV_FILE should be changed to $SNAP_DATA/config/security-bootstrapper/overrides.env