Add a test to validate WDLs in the scripts directory.

[gbggrant]

No description provided.

[gbggrant]

@cmnbroad I saw your comment in #7822. I'm trying to add WDL validation here, using the infrastructure in gradle. I was interested here in just validating the WDLs in the scripts directory.

[cmnbroad]

@gbggrant One comment on naming, otherwise looks good to merge once thats addressed. Thanks for doing this.

[cmnbroad]

Can you modify the names (workflow names, name property, gradle task names, and comments) so the "scripts" and "generated" versions are more clearly distinguished from each other (i.e., validteScriptsWDL and validateGeneratedWDL or something similar). Its hard to tell from looking at just this definition that it's not doing the autogenerated validation.

[mcovarr]

👍 with Chris's suggestions

[codecov]

Codecov Report

Merging #7826 (91af7ec) into master (c72f2a8) will decrease coverage by 0.002%.
The diff coverage is n/a.

❗ Current head 91af7ec differs from pull request most recent head db7b43f. Consider uploading reports for the commit db7b43f to get more accurate results

@@               Coverage Diff               @@
##              master     #7826       +/-   ##
===============================================
- Coverage     86.955%   86.953%   -0.002%     
+ Complexity     36903     36902        -1     
===============================================
  Files           2214      2214               
  Lines         173540    173540               
  Branches       18735     18735               
===============================================
- Hits          150902    150899        -3     
- Misses         16036     16039        +3     
  Partials        6602      6602               

Impacted Files	Coverage Δ
.../hellbender/utils/python/PythonUnitTestRunner.java	75.410% <0.000%> (-3.279%)	⬇️
...nder/utils/runtime/StreamingProcessController.java	66.818% <0.000%> (-0.455%)	⬇️
...itute/hellbender/tools/LocalAssemblerUnitTest.java	92.448% <0.000%> (ø)