cleanup pipeline, use make for building and loading

[tomqin93]

What this PR does / why we need it:
This PR updates Azure Pipeline file to make it more readable
Will this PR make the community happier?
Yes
Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

How is this PR tested

• unit test
• e2e test
• other (please specify)

Special notes for your reviewer:

Release note:

- use make for building and loading images
- adds missing build commands in makefile
- cleanup azure pipeline
- adds missing load statement in customized deviceShifu's example README 

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (f302239) 56.35% compared to head (52f4312) 56.35%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #534   +/-   ##
=======================================
  Coverage   56.35%   56.35%           
=======================================
  Files          21       21           
  Lines        2062     2062           
=======================================
  Hits         1162     1162           
  Misses        792      792           
  Partials      108      108           

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