Proposal: Rename time window parameters (start, end) in dashboard and logs page

Proposal

Current both our dashboard and logs pages depend on query parameters called start and end. In particular, end is a reserved word in Ruby.

We should consider deciding on a standard that we can switch to moving forward and documenting it so it gets used in our all our monitoring APIs.

Original discussion

The following discussion from !22734 (merged) should be addressed:

• @akohlbecker started a discussion: (+2 comments)

  Should we standardise on one name throughout the feature? start_time and end_time? I realise you probably can't use end in ruby.