Add fieldalignment make target

[djaglowski]

See #95

It would be nice to have this functionality readily available so we can easily identify further improvements, and also so that we can easily validate that we have not regressed.

[chasekiefer]

Do you want a specific target to run this? Otherwise I can just add the maligned linter to the .golangci.yml configuration. Maligned seems to be the golangci-lint supported version of fieldalignment.

[djaglowski]

maligned appears to be deprecated, and suggests to use fieldalignment instead, so I think we should follow that.

I think a new make target is fine for this. The goal here is not really to aggressively push for these optimizations, but rather to ensure that when a developer chooses to optimize, they are doing so in a consistent manner.

[pmalek-sumo]

@djaglowski Please take a look at my proposal in #218

There's more to be changed in code but I've demonstrated a gradual approach by changing just a handful of files.

[djaglowski]

Addressed in #218