[FEATURE] Output results of only certain attributes

[nitbharambe]

Description

Currently in PGM, it is possible to output results of only required components using the output_component_types argument in calculate_* functions. In very big grids with large batches, even this output can be huge.

Also having the output of all line array is inefficient for example when only id and loading are required. Another example can be at load/gen where only p and q are required.

At such cases it might be useful to output only certain attributes.

[nitbharambe]

Implemented by #548