Allow adding power port templates to modules

[k-304]

Related Issue

No issue, context described below.

New Behavior

NetBox allows adding components (like power ports) to module types, not only to device types. This PR will address this.
Some users want to use module bays, hosting power supplies. This power supplies have a module type, which has power port templates. E.g: https://www.netbox.net/dcim/module-types/1/power-ports/

Contrast to Current Behavior

This PR adds module_type, which allows adding a power port to an existing module type in NetBox. Therefor one of device_type or module_type is required.

Discussion: Benefits and Drawbacks

This PR adds a feature that is already implemented in the NetBox GUI, but missing in the Ansible collection/module. For example, the device library uses module types for PSU's: https://github.com/netbox-community/devicetype-library/blob/a7718d8d4b0a9d2f196166f5cbc4831bfb6be490/device-types/HPE/ProLiant-DL580-Gen10.yaml#L13 and we can add modules with a module type to this slot. With the power port assigned to the module type, there will be a power port created with the module assignment. No further need to create additional power ports in an extra step.

Changes to the Documentation

All needed changes to the docs are included in the code.

Proposed Release Note Entry

Add the ability to create power ports for module types.

Double Check

• I have read the comments and followed the CONTRIBUTING.md.
• I have explained my PR according to the information in the comments or in a linked issue.
• My PR targets the devel branch.

[sc68cal]

Needs a test exercising this functionality

[k-304]

Needs a test exercising this functionality

Added tests for v3.5 and v3.6.