Populate ExecutionError Kind from Container Errors

[EngHabu]

TL;DR

FlyteKit populates a Container Error message that the plugin machinery then transforms into ExecutionError. In the process, we do not populate the execution error kind leading to tasks always getting tagged with Unknown Kind

Type

• Bug Fix
• Feature
• Plugin

Are all requirements met?

• Code completed
• Smoke tested
• Unit tests added
• Code documentation added
• Any pending items have an associated Issue

Tracking Issue

flyteorg/flyte#300

[codecov-io]

Codecov Report

Merging #83 into master will decrease coverage by 0.03%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #83      +/-   ##
==========================================
- Coverage   55.01%   54.97%   -0.04%     
==========================================
  Files          91       91              
  Lines        4657     4660       +3     
==========================================
  Hits         2562     2562              
- Misses       1818     1821       +3     
  Partials      277      277              

Impacted Files	Coverage Δ
...uginmachinery/ioutils/remote_file_output_reader.go	0.00% <0.00%> (ø)

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