Inventory file for static docker containers

[Haroon-Khel]

Like the inventory.yml file we need a file which keeps track of the docker containers hosted on the dockerhost machines. It should also keep track of the details of the container, for example its port and its name in jenkins node name

[Haroon-Khel]

Moving to 2Q plan when its created

[Haroon-Khel]

#3423 is finalised. Repeating what I mentioned here, we need a system in place to keep the new docker static inventory file updated, ie an automated github action which runs the script, if it detects differences between the output and the existing DockerInventory.json file, it makes a pr to update it

[Haroon-Khel]

Update documentation to reflect changes made in #3423

[Haroon-Khel]

Docs pr is in #3537