Avoid -fforce-recomp when benchmarking#2565
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When running benchmarks, we found a quirk in cabal that causes the link step to override the time measures collected during the build step.
To obtain useful measures in the end, we have been forcing the link step to rebuild modules with
-fforce-recompwhen running benchmarks. This duplicated the benchmark time, as modules were built twice, first in the build step, and a second time in the link step!This PR avoids the need for
-fforce-recompby instead collecting time measures only when the Liquid Haskell plugin runs. Since the plugin only runs in the build step, measures are not overwritten in the linking step anymore.