feat: add nucleus connectivity validation

[tiancishen]

Issue #, if available:

Description of changes:

• Add validations to check mqtt and http connections work after merging in Nucleus configuration
• Validation can be disabled if the component validation timeout is set to 0, the validateConnectivityDuringDeployment Nucleus config is set to false, or the device is configured to be offline

Example of errors that can be seen on the console:

MQTT validation failures

• NUCLEUS_CONNECTIVITY_CONFIG_NOT_VALID: FAILED_NO_STATE_CHANGE: Mqtt client failed to connect with the new configuration: port must be a positive integer between 1 and 65535
• NUCLEUS_CONNECTIVITY_CONFIG_NOT_VALID: FAILED_NO_STATE_CHANGE: Mqtt client validation timed out with the new configuration
• NUCLEUS_CONNECTIVITY_CONFIG_NOT_VALID: FAILED_NO_STATE_CHANGE: Mqtt client validation completed exceptionally with the new configuration: software.amazon.awssdk.crt.mqtt.MqttException: Host name was invalid for dns resolution

HTTP validation failure

• NUCLEUS_CONNECTIVITY_CONFIG_NOT_VALID: FAILED_NO_STATE_CHANGE: HTTP client validation with the new configuration Received an UnknownHostException when attempting to interact with a service. See cause for the exact endpoint that is failing to resolve. If this is happening on an endpoint that previously worked, there may be a network connectivity issue or your DNS cache could be storing endpoints for too long.

Why is this change necessary:
Nucleus doesn't validate mqtt and http connections when merging in a new configuration from deployment. Prevent Nucleus from accepting a bad configuration deployment by validating connectivity with the deploymeny Nucleus configuration

How was this change tested:

• Updated or added new unit tests.
• Updated or added new integration tests.
• Updated or added new end-to-end tests.
• If my code makes a remote network call, it was tested with a proxy.

Test using UATs covers the following scenarios:

• Bad network Proxy
• Bad Mqtt port
• Bad Mqtt timeouts
• Bad Iot data endpoint
• Bad GG data endpoint and port
• Bad config with validation disabled

Any additional information or context required to review the change:

Documentation Checklist:

• Updated the README if applicable.

Compatibility Checklist:

• I confirm that the change is backwards compatible.
• Any modification or deletion of public interfaces does not impact other plugin components.
• For external library version updates, I have reviewed its change logs and Nucleus does not consume
  any deprecated method or type.

Refer to Compatibility Guidelines for more information.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

updated