Introduce Op Builder API

[mirza-halilcevic]

• Implement a separate API that performs the graph construction for specific operators instead of it being done directly in the parser
• Resolves Common API - Op Builder API migraphx-benchmark/AMDMIGraphX#190

[codecov]

Codecov Report

Attention: Patch coverage is 98.67725% with 5 lines in your changes missing coverage. Please review.

Project coverage is 92.24%. Comparing base (19d8b1b) to head (90f3b3b).
Report is 42 commits behind head on develop.

Files	Patch %	Lines
src/op/builder/einsum.cpp	98.91%	3 Missing ⚠️
src/op/builder/op_builder.cpp	80.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3328   +/-   ##
========================================
  Coverage    92.24%   92.24%           
========================================
  Files          495      500    +5     
  Lines        19849    19889   +40     
========================================
+ Hits         18309    18347   +38     
- Misses        1540     1542    +2     

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[CharlieL7]

What's the status of this PR? Should anything be reviewed at this stage or a meeting held?

[mirza-halilcevic]

What's the status of this PR? Should anything be reviewed at this stage or a meeting held?

Work on this was put on hold due to higher-priority tasks on CK. However, this can be reviewed as is. What remains is the implementation of builders for the remaining operations.