Build CBMC with cmake in all "CBMC latest" jobs (#2965)

The "CBMC latest" workflow is composed of two jobs (`regression` and
`perf`) which perform testing with the most recent development version
of CBMC. At present, the `regression` jobs are not actually testing with
the CBMC that we build from source, but the CBMC installed through the
setup scripts, as revealed in #2954.

This PR changes the `regression` jobs so that they use `cmake` to build.
This allows the runner to pick up the recently-built CBMC development
version instead of the one installed through setup scripts, as it's done
in the `perf` jobs. Unfortunately, [this CI
run](https://github.com/adpaco-aws/rmc/actions/runs/7390380572) doesn't
demonstrate the fix as it should due to an unrelated breaking change in
the latest CBMC version. However, #2952 provides more context in case
you need it.

Author: adpaco-aws

.github/workflows/cbmc-latest.yml

@@ -45,8 +45,8 @@ jobs:
       - name: Build CBMC
         working-directory: ./cbmc
         run: |
-          make -C src minisat2-download cadical-download
-          make -C src -j4 MINISAT2=../../minisat-2.2.1 CADICAL=../../cadical
+          cmake -S . -Bbuild -DWITH_JBMC=OFF -Dsat_impl="minisat2;cadical"
+          cmake --build build -- -j 4
           # Prepend the bin directory to $PATH
           echo "${GITHUB_WORKSPACE}/cbmc/build/bin" >> $GITHUB_PATH