[tooling/impi] Evaluate packages of current module only

[djaglowski]

Related to #9888

Currently causing issues with excluding a module on #9922

[bogdandrutu]

Just temporary disable impi everywhere, or another option is to have a Makefile with all the rules do nothing (test, impi, etc.)

[djaglowski]

I actually think this is the correct change. Some more details in #9888, but basically the problem is that impi is currently overlapping coverage between nested modules. This means there is no way to exclude a nested module because make impi at the root module will cover it anyways.

I believe this change results in no loss of coverage in our CI though, as we still run make impi in each module as part of make golint. The only way in which this changes coverage is if someone runs make impi at the root module and expects it to cover all modules. For that case, I have proposed in #9888 that there should be a corresponding "all-impi" (name tbd) target that runs impi for each module.

[djaglowski]

@bogdandrutu, do you mind taking another look at this? If you are ok with this change based on my comment above, this will allow #9922 to move forward.