fix: error handling for parsing iteration data files

[elit-altum]

This PR separately handles #2688 (comment)

1. Uses the path.extname method for getting the extension of the file being used for providing iteration data -d
2. If the filetype is .json -> liquidJSON is used to parse and report any errors.
3. If the filetype is .csv -> parseCSV is used to parse and report any errors.
4. If none, the fallback informs the user to use only .json/.csv files.

@shamasis @codenirvana Please review!

[codecov]

Codecov Report

Merging #2700 (8ea83cb) into develop (2a57036) will increase coverage by 0.09%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #2700      +/-   ##
===========================================
+ Coverage    91.55%   91.65%   +0.09%     
===========================================
  Files           21       21              
  Lines         1113     1114       +1     
  Branches       339      340       +1     
===========================================
+ Hits          1019     1021       +2     
+ Misses          94       93       -1     

Flag	Coverage Δ
cli	82.22% <60.00%> (-0.17%)	⬇️
integration	41.83% <80.00%> (-0.13%)	⬇️
library	61.13% <100.00%> (+1.02%)	⬆️
unit	76.92% <60.00%> (-0.16%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
lib/run/options.js	96.18% <100.00%> (+0.76%)	⬆️
lib/util.js	95.29% <100.00%> (+0.05%)	⬆️

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[elit-altum]

@codenirvana @shamasis Please review this once, if you find the time!