[Config-CLI Parity][Fix] Populate config object when config file is not provided

[ashmeenkaur]

Description

Config object should be populated with only CLI flags in cases where config file is not provided.
Also resolves the config file path before usage.

Link to the issue in case of a bug fix.

NA

Testing details

1. Manual - Tested manually and printed the config object to confirm it is working as intended
2. Unit tests - NA
3. Integration tests - NA

[codecov]

Codecov Report

Attention: Patch coverage is 20.00000% with 8 lines in your changes missing coverage. Please review.

Project coverage is 71.48%. Comparing base (52b1e10) to head (2faa7ce).
Report is 344 commits behind head on master.

Files with missing lines	Patch %	Lines
cmd/root.go	20.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2042      +/-   ##
==========================================
+ Coverage   71.46%   71.48%   +0.01%     
==========================================
  Files          99       99              
  Lines       10800    10803       +3     
==========================================
+ Hits         7718     7722       +4     
+ Misses       2735     2734       -1     
  Partials      347      347              

Flag	Coverage Δ
unittests	71.48% <20.00%> (+0.01%)	⬆️

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