Significant changes

• Make Paths_ modules work with non-standard preludes again #5962

  • Generate Paths_ module with qualified Data.List.last import so that compatibility with non-standard preludes is not regressed compared to cabal 3.4.

• Windows: redo the fix to breakage caused by new autoconf; the wrong fix made cabal sometimes fail with old autoconf #7494 #7649

  • Reverts #7510 that failed on Windows when used with pre-generated scripts included in packages such as network, time, process.
  • Adds a subtler fix/workaround for the deficiencies of new autoconf versions on Windows.

Other changes

• Regenerate bootstrap/ with GHC updated from 8.10.4 to 8.10.7

  • This regenerates bootstrap plans using new package versions and also updating GHC from 8.10.4 to 8.10.7, as requested by GHC HQ.