Improve taskset/HTTP template logging

[alexec]

A lot of the logging for taskset/http template logs the Go object, which results in log lines that are (a) not very human readable and (b) not very machine readable, therefore less helpful that they could be:

Example:

             controller | time="2021-11-17T18:01:51.237Z" level=debug msg="patching the exiting taskset" TaskSet="map[controller-plugin-template-qj4gt:{main {[] []} {[] [] <nil> <nil>} map[] nil {map[] map[]} <nil> [] nil nil nil nil nil nil nil nil 0xc0005b5308 [] [] [] nil <nil> nil <nil> <nil> []   <nil>  <nil> nil [] nil  nil nil nil }]" namespace=argo workflow=controller-plugin-template-qj4gt

We could log the JSON of the object, but that's not machine readable. Better to just be structured.

[alexec]

@sarabala1979 could ask you to own this please?

[sarabala1979]

I will take it

…

Sent from my iPhone

On Nov 17, 2021, at 6:05 PM, Alex Collins ***@***.***> wrote:  @sarabala1979 could ask you to own this please? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or unsubscribe. Triage notifications on the go with GitHub Mobile for iOS or Android.

[alexec]

@sarabala1979 I'm going to pick this up:

1. I have a clear idea of what changes I want
2. It'll take about 1h for me to do.
3. This is blocker for the plugins.