"conda activate" called after process launch, when it should be prior to launch

[mind6]

Environment data

• VS Code version: 1.37.1
• Extension version (available under the Extensions sidebar): 2019.8.30787
• OS and version: Windows 10
• Python version (& distribution if applicable, e.g. Anaconda): 3.7.3, conda 4.7.10
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): conda

Expected behaviour

When pressing F5 or Ctrl-F5 opening a new integrated window, it should call conda activate then start the launcher process

Actual behaviour

The opposite order, causing libraries to not be found.

Steps to reproduce:

1. install Anaconda 64-bit on windows
2. create new python file with "import numpy"
3. make sure there are no terminals in the panel
4. press F5 or Ctrl-F5 to launch the file

Logs

Output in the terminal window

Microsoft Windows [Version 10.0.18362.295]
(c) 2019 Microsoft Corporation. All rights reserved.

c:\Users\Kirby\Documents\vs-test>C:\Users\Kirby\Anaconda3\python.exe c:\Users\Kirby\.vscode\extensions\ms-python.python-2019.8.30787\pythonFiles\ptvsd_launcher.py --default --nodebug --client --host localhost --port 63619 c:\Users\Kirby\Documents\vs-test\Untitled-1.py
Traceback (most recent call last):
  File "c:\Users\Kirby\.vscode\extensions\ms-python.python-2019.8.30787\pythonFiles\ptvsd_launcher.py", line 43, in <module>
    main(ptvsdArgs)
  File "c:\Users\Kirby\.vscode\extensions\ms-python.python-2019.8.30787\pythonFiles\lib\python\ptvsd\__main__.py", line 432, in main
    run()
  File "c:\Users\Kirby\.vscode\extensions\ms-python.python-2019.8.30787\pythonFiles\lib\python\ptvsd\__main__.py", line 316, in run_file
    runpy.run_path(target, run_name='__main__')
  File "C:\Users\Kirby\Anaconda3\lib\runpy.py", line 263, in run_path
    import numpy
  File "C:\Users\Kirby\Anaconda3\lib\site-packages\numpy\__init__.py", line 140, in <module>
    from . import _distributor_init
  File "C:\Users\Kirby\Anaconda3\lib\site-packages\numpy\_distributor_init.py", line 34, in <module>
    from . import _mklinit
ImportError: DLL load failed: The specified module could not be found.

c:\Users\Kirby\Documents\vs-test>C:/Users/Kirby/Anaconda3/Scripts/activate

(base) c:\Users\Kirby\Documents\vs-test>conda activate base

(base) c:\Users\Kirby\Documents\vs-test>

I think this is the same bug as #4462 but it was incorrectly closed.

Please note if you right click on the file, and select "Run Python File in Terminal", the activation comes first and the process runs correctly.

[DonJayamanne]

Dup of #5559