Allow collector to run as a different user

[rafaelpereyra]

Description: While fixing #524 , the ability to use an environment variable (AOT_RUN_USER) was removed from the code forcing the collector to run with the default user (aoc).

Use case:

• System administrators might be interested in controlling the user running this collector to match any naming convention or UID/GID patterns.

Solution:

Partially revert the code to use the function getCustomUser to populate the variable aocUserName and default to aoc otherwise.

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[github-actions]

This issue was closed because it has been marked as stall for 30 days with no activity.