Reorganize directory structure of end-to-end tests

[narrieta]

The initial directory structure came straight from the dcr prototype. This PR creates a better structure to organize the code. The only code changes are to update paths.

• docker - Dockefile and any other files we may need to maintain the test containers
• pipeline - Configuration and scripts to support/interface with the Azure Pipeline
• scenarios - Test scenarios

[codecov]

Codecov Report

Merging #2708 (e3ed8ae) into develop (6872bef) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #2708      +/-   ##
===========================================
- Coverage    71.95%   71.94%   -0.01%     
===========================================
  Files          104      104              
  Lines        15765    15765              
  Branches      2244     2244              
===========================================
- Hits         11343    11342       -1     
  Misses        3906     3906              
- Partials       516      517       +1     

Impacted Files	Coverage Δ
azurelinuxagent/common/protocol/hostplugin.py	87.50% <0.00%> (-0.27%)	⬇️

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[nagworld9]

so, the structure for scripts outside of scenarios used/run by azure pipeline and scenario scripts used/run by lisa