GROOVY-11563: STC: check compound assignment x op= y like x = x op y

[eric-milles]

This is a work-in-progress to visit the implied binary expression from a compound assignment to get type-checking similar to the explicit long form. The GROOVY-10628 elvis assignment special-case approach is extended and moved up a bit earlier.

There are still several test case failures to investigate and deal with.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 93.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 68.8288%. Comparing base (6dff05e) to head (7ba1012).

Files with missing lines	Patch %	Lines
src/main/groovy/groovy/grape/GrapeIvy.groovy	50.0000%	1 Missing ⚠️
...ovy/classgen/asm/sc/StaticTypesCallSiteWriter.java	0.0000%	1 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                 @@
##               master      #2148        +/-   ##
==================================================
+ Coverage     68.8286%   68.8288%   +0.0002%     
+ Complexity      29443      29441         -2     
==================================================
  Files            1420       1420                
  Lines          113168     113188        +20     
  Branches        19550      19555         +5     
==================================================
+ Hits            77892      77906        +14     
- Misses          28737      28738         +1     
- Partials         6539       6544         +5     

Files with missing lines	Coverage Δ
...roovy/transform/stc/StaticTypeCheckingVisitor.java	87.6373% <100.0000%> (-0.0433%)	⬇️
src/main/groovy/groovy/grape/GrapeIvy.groovy	39.1429% <50.0000%> (ø)
...ovy/classgen/asm/sc/StaticTypesCallSiteWriter.java	74.0125% <0.0000%> (ø)

... and 7 files with indirect coverage changes