Allow multiple arguments to be substituted in one run

[kumare3]

TL;DR

A query like

     SELECT
        	COUNT(*) as total_count
    	FROM
        	hive.events.{{ .Inputs.table }}
    	WHERE
        	ds = '{{ .Inputs.ds }}' AND hr = {{ .Inputs.hr }} AND min = {{ .Inputs.min }}

should be substituted.

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

Complete description

How did you fix the bug, make the feature etc. Link to any design docs etc

Tracking Issue

flyteorg/flyte#320

Follow-up issue

flyteorg/flyte#321

[codecov-commenter]

Codecov Report

Merging #92 into master will increase coverage by 0.35%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##           master      #92      +/-   ##
==========================================
+ Coverage   55.00%   55.35%   +0.35%     
==========================================
  Files          91       92       +1     
  Lines        4663     4666       +3     
==========================================
+ Hits         2565     2583      +18     
+ Misses       1821     1809      -12     
+ Partials      277      274       -3     

Impacted Files	Coverage Δ
go/tasks/pluginmachinery/utils/template.go	71.25% <86.36%> (+9.05%)	⬆️
go/tasks/pluginmachinery/utils/error_collection.go	100.00% <100.00%> (ø)
go/tasks/pluginmachinery/utils/transformers.go	100.00% <0.00%> (+50.00%)	⬆️

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