Add tpl to configmaps

[lozbrown]

Add TPL to all functions to support allowing environment specifics to in seperate values files.

as suggested on slack by @nineinchnick

[nineinchnick]

I'm reluctant to adding tpl everywhere without explicit use cases, because there might be unexpected side effects and we won't be able to remove this without breaking backward compatibility.

We should add tests showcasing the usage for every place we're adding tpl calls.