[SymForce] Run tests once

We've been running all our tests twice in github actions on passing
runs.  `ctest --rerun-failed` runs all the tests if none of the tests
have ever failed.  This should save around 800s on github actions (idk
why symengine_symforce_docs_test is so slow on github actions, possibly
the lower core count).

Tested both the passing and failing cases on github actions
[here](aaron-skydio#3)

Reviewers: bradley,nathan,chao,hayk
Topic: sf-test-once
GitOrigin-RevId: 84eeb36ab9f82350dd73c2a9f3c082a1db6278eb

.github/workflows/ci.yml

@@ -128,8 +128,11 @@ jobs:
           pip install build/lcmtypes/python2.7
           export PYTHONPATH=$PYTHONPATH:$(pwd)
           ${{ matrix.python }} test/symforce_requirements_test.py --update
-          ctest --test-dir build -j $(nproc) || true
-          ctest --test-dir build -j $(nproc) --rerun-failed --output-on-failure
+          EXIT_CODE=0
+          ctest --test-dir build -j $(nproc) || EXIT_CODE=$?
+          if [ $EXIT_CODE -ne 0 ]; then
+            ctest --test-dir build -j $(nproc) --rerun-failed --output-on-failure
+          fi
 
       # Upload the docs as an artifact
       # To view, download the `docs` artifact from the build and matrix entry you're interested in