offline-tests: fail on comparison in offline-tests (#2095)

Two main problems fixed here:
- offline tests will fail on a comparison failure (a mistake from the
re-write)
- art-group-info is committed to the repo and shared with every thread
(running the tests with 1 thread, for example on the CI, and locally
were producing different results)

art files are still not provided to the jak2 offline tests:
- `*-ag` files are not being output
- `art-elts.gc` is not complete, as a handful of files claim to be
missing stuff

lastly, in jak1's offline tests we were also running `tpage` and `*-vis`
files through the decompiler. This omits that (they came from the
`all_objs.json` file) -- is this an issue?

test/decompiler/reference/jak2/engine/common_objs/collectables_REF.gc

@@ -3376,7 +3376,3 @@
 
 ;; failed to figure out what this is:
 0
-
-
-
-

test/decompiler/reference/jak2/levels/atoll/atoll-part_REF.gc

@@ -1078,7 +1078,3 @@
     (sp-flt spt-userdata 0.0)
     )
   )
-
-
-
-

test/decompiler/reference/jak2/levels/atoll/atoll-scenes_REF.gc

@@ -2853,7 +2853,3 @@
     :save #t
     )
   )
-
-
-
-

test/decompiler/reference/jak2/levels/city/kid_escort/crocesc-h_REF.gc

@@ -93,7 +93,3 @@
 
 ;; failed to figure out what this is:
 0
-
-
-
-

test/decompiler/reference/jak2/levels/city/market/ctymark-obs_REF.gc

@@ -1605,7 +1605,3 @@
   0
   (none)
   )
-
-
-
-

test/decompiler/reference/jak2/levels/common/enemy/fodder/fodder_REF.gc

@@ -1197,7 +1197,3 @@
 (defmethod enemy-method-99 fodder ((obj fodder) (arg0 process-focusable))
   (logtest? (focus-status mech) (-> arg0 focus-status))
   )
-
-
-
-

test/decompiler/reference/jak2/levels/mars_tomb/tomb-scenes_REF.gc

@@ -2639,7 +2639,3 @@
     :save #t
     )
   )
-
-
-
-

test/decompiler/reference/jak2/levels/sewer/escort/jinx-h_REF.gc

@@ -40,7 +40,3 @@
 
 ;; failed to figure out what this is:
 0
-
-
-
-