Release 5.0.0-pre.20210802.5 (2021-08-13)

Baseline: 23f171e2

Cherry picks:

   + 7b4f9826:
     Automated rollback of commit
     7649f610.
   + 14e4a78a:
     Automated rollback of commit
     23f171e2.
   + 99a85e79:
     Automated rollback of commit
     92f7b586.

Incompatible changes:

  - JavaToolchainInfo.jvm_opt returns Depset instead of a list.

Important changes:

  - When using MemoryProfiler with multiple GCs via the
    --memory_profile_stable_heap_parameters flag, we do a more
    precise calculation of heap used at the end of the build. This
    will generally result in lower values.
  - --bep_publish_used_heap_size_post_build is deprecated. Use
    --memory_profile=/dev/null instead.

This release contains contributions from many people at Google, as well as Andrew Katson, Christopher Peterson Sauer, Dan Bamikiya, Keith Smiley, Rai, Yannic Bonenberger.