Add mosquitto logs to support bundle

[khyatimahendru]

Add mosquitto logs to support bundle

Modified the bin/support script to also include local mosquitto logs (/var/log/mosquitto/mosquitto.log) in the generated support archive if the file exists. This will make it easier to debug test failures related to MQTT traffic on the local test instances.

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PR created automatically by Jules for task 1993886326465635456 started by @khyatimahendru

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