fix: activateCondaEnv on Linux

[luisffranca]

The activateCondaEnv command works on Windows but returns an empty Seq() for other OS's.

As a consequence when running, for example, installPipPackage on Linux the Python wheels are installed under the base conda environment and not synapseml. Also, when running testPython there are some errors such as

~/anaconda3/bin/python: No module named pytest

With this fix activateCondaEnv will also work on Linux using conda run (as the comment in the code suggests, running conda activate fails).

[mhamilton723]

/azp run

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov-commenter]

Codecov Report

Merging #1303 (75fc8e9) into master (2c1a0fb) will increase coverage by 0.05%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1303      +/-   ##
==========================================
+ Coverage   84.70%   84.76%   +0.05%     
==========================================
  Files         287      280       -7     
  Lines       14231    14096     -135     
  Branches      732      732              
==========================================
- Hits        12055    11948     -107     
+ Misses       2176     2148      -28     

Impacted Files	Coverage Δ
...org/apache/spark/ml/param/JsonEncodableParam.scala	53.33% <0.00%> (-26.67%)	:arrow_down:
...g/apache/spark/ml/param/PythonWrappableParam.scala	66.66% <0.00%> (-8.34%)	:arrow_down:
...soft/azure/synapse/ml/cognitive/TextToSpeech.scala	84.84% <0.00%> (-3.04%)	:arrow_down:
...oft/azure/synapse/ml/cognitive/TextAnalytics.scala	85.82% <0.00%> (-2.69%)	:arrow_down:
.../azure/synapse/ml/cognitive/TextAnalyticsSDK.scala	86.01% <0.00%> (-1.40%)	:arrow_down:
...ft/azure/synapse/ml/cognitive/FormRecognizer.scala	81.00% <0.00%> (-1.00%)	:arrow_down:
...t/azure/synapse/ml/cognitive/BingImageSearch.scala	89.28% <0.00%> (-0.90%)	:arrow_down:
...python/synapse/ml/io/http/SimpleHTTPTransformer.py
...main/python/synapse/ml/io/http/ServingFunctions.py
...main/python/synapse/ml/io/http/JSONOutputParser.py
... and 5 more

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[azure-pipelines[bot]]

Commenter does not have sufficient privileges for PR 1303 in repo microsoft/SynapseML

[imatiach-msft]

/azp run

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[luisffranca]

/azp run

[azure-pipelines[bot]]

Commenter does not have sufficient privileges for PR 1303 in repo microsoft/SynapseML

[imatiach-msft]

/azp run

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).