Adopted script changes in GitHub Actions

- Moved to Ubuntu 22.04

  This notably means we no longer have to bend over backwards to
  install GCC 10!

- Changed shell in gha to include the verbose/undefined flags, making
  debugging gha a bit less painful

- Adopted the new test.py/test_runners framework, which means no more
  heavy recompilation for different configurations. This reduces the test job
  runtime from >1 hour to ~15 minutes, while increasing the number of
  geometries we are testing.

- Added exhaustive powerloss testing, because of time constraints this
  is at most 1pls for general tests, 2pls for a subset of useful tests.

- Limited coverage measurements to `make test`

  Originally I tried to maximize coverage numbers by including coverage
  from every possible source, including the more elaborate CI jobs which
  provide an extra level of fuzzing.

  But this missed the purpose of coverage measurements, which is to find
  areas where test cases can be improved. We don't want to improve coverage
  by just shoving more fuzz tests into CI, we want to improve coverage by
  adding specific, intentioned test cases, that, if they fail, highlight
  the reason for the failure.

  With this perspective, maximizing coverage measurement in CI is
  counter-productive. This changes makes it so the reported coverage is
  always less than actual CI coverage, but acts as a more useful metric.

  This also simplifies coverage collection, so that's an extra plus.

- Added benchmarks to CI

  Note this doesn't suffer from inconsistent CPU performance because our
  benchmarks are based on purely simulated read/prog/erase measurements.

- Updated the generated markdown table to include line+branch coverage
  info and benchmark results.

.github/workflows/post-release.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   post-release:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       # trigger post-release in dependency repo, this indirection allows the
       # dependency repo to be updated often without affecting this repo. At
@@ -21,6 +21,7 @@ jobs:
               event_type: "post-release",
               client_payload: {
                 repo: env.GITHUB_REPOSITORY,
-                version: "${{github.event.release.tag_name}}"}}' \
-              | tee /dev/stderr)"
+                version: "${{github.event.release.tag_name}}",
+              },
+            }' | tee /dev/stderr)"