chore: For python tests, we are increasing XMX

[FarrukhMasud]

Related Issues/PRs

We have seen that python tests for deep learning because smaller heap size. In this PR I am increasing this XMX to 4gb and essentially using same vaklues as we use for R tests

How is this patch tested?

This is just a change in pipeline and it will be tested by the pipeline

Does this PR change any dependencies?

• No. You can skip this section.
• Yes. Make sure the dependencies are resolved correctly, and list changes here.

Does this PR add a new feature? If so, have you added samples on website?

• No. You can skip this section.
• Yes. Make sure you have added samples following below steps.

[FarrukhMasud]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.99%. Comparing base (bab6aed) to head (30f2e7b).

❗ There is a different number of reports uploaded between BASE (bab6aed) and HEAD (30f2e7b). Click for more details.

HEAD has 113 uploads less than BASE

Flag	BASE (bab6aed)	HEAD (30f2e7b)
	152	39

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #2345       +/-   ##
===========================================
- Coverage   84.55%   71.99%   -12.57%     
===========================================
  Files         328      328               
  Lines       16848    16848               
  Branches     1513     1513               
===========================================
- Hits        14246    12129     -2117     
- Misses       2602     4719     +2117     

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[FarrukhMasud]

not neerded

[FarrukhMasud]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[FarrukhMasud]

Not needed