Update api used to get workspace path on source:deploy

[lcampos]

What does this PR do?

Updates the api used to set the workspace path when running source:deploy.

What issues does this PR fix or reference?

@W-5608272@, #737, #734

[codecov]

Codecov Report

Merging #738 into develop will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff            @@
##           develop     #738   +/-   ##
========================================
  Coverage    74.16%   74.16%           
========================================
  Files          163      163           
  Lines         6615     6615           
  Branches      1037     1037           
========================================
  Hits          4906     4906           
  Misses        1440     1440           
  Partials       269      269

Impacted Files	Coverage Δ
...cedx-vscode-core/src/commands/forceSourceDeploy.ts	42.5% <0%> (ø)	⬆️

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[salesforce-cla]

Thanks for the contribution! Unfortunately we can't verify the commit author(s): Luis Campos <l***@s***.com>. One possible solution is to add that email to your GitHub account. Alternatively you can change your commits to another email and force push the change. After getting your commits associated with your GitHub account, refresh the status of this Pull Request.