Simplify fetchLogs in the logs vuex store

export const fetchLogs = ({ commit, state }, podName) =>

Is doing too much right now, and could be split.

Original discussion

The following discussion from !18567 (merged) should be addressed:

• @filipa started a discussion: (+1 comment)

  let's break this please. There is a lot of things happening in this, this should only fetch data.

  let's create an action to set the name and call it