Use cached builds

[oliverchang]

Overall goal:

1. Replace chronos build (https://github.com/google/oss-fuzz/tree/dd978a43f8b4c57a95258de921b3e0331c8cb77e/infra/experimental/chronos) with what's described here: Add ccache to base-builder. oss-fuzz#12675 (comment)

2. Have OSS-Fuzz-Gen use this.

Breakdown of steps:

• Support using cached image in OSS-Fuzz build steps: infra: enable building projects using cached images oss-fuzz#12597
• Make ccache work with jcc. The best solution here might be for jcc to just call out to the fake clang/clang++ symlinks that really point to ccache (if this doesn't already work).
• Replace existing chronos mechanisms (https://github.com/google/oss-fuzz/blob/dd978a43f8b4c57a95258de921b3e0331c8cb77e/infra/experimental/chronos/chronos.sh) with ccache based mechanism.
• Get rid of recompile, and just use/overwrite compile in cached images. At this point, we just need to inject PATH=/ccache/bin:$PATH to make use of ccache
• Complete infra: add script to capture replayable commands oss-fuzz#12608 and integrate this into chronos
• Implement algo described in Add ccache to base-builder. oss-fuzz#12675 (comment)