Merge #1951

1951: build sysimg but don't fail on error, disable running tests with sysimg until 1.5.4 bugfix r=jakebolewski a=jakebolewski

### Description

Due to bugs in the julia 1.5.(2,3) runtime, the CI sysimg build is currently broken.  Disable until Julia v1.5.4 with included bugfixes is released JuliaLang/julia#39351.




Co-authored-by: Jake Bolewski <jakebolewski@gmail.com>

Author: bors[bot]

.github/workflows/OS-UnitTests.yml

@@ -72,10 +72,11 @@ jobs:
 
     - name: Build System Image
       if: steps.filter.outputs.run_test == 'true'
+      continue-on-error: true
       run: |
         julia --project=@. .dev/systemimage/climate_machine_image.jl ClimateMachine.so true
 
     - name: Run Unit Tests
       if: steps.filter.outputs.run_test == 'true'
       run: |
-        julia --project=@. -J ClimateMachine.so -e 'using Pkg; Pkg.test()'
+        julia --project=@. -e 'using Pkg; Pkg.test()'