hadrian: Introduce new package database for executables needed to build stage0

These executables (such as hsc2hs) are built using the boot compiler and
crucially, most libraries from the global package database.

We also move other build-time executables to be built in this stage such
as linters which also cleans up which libraries end up in the global
package database. This allows us to remove hacks where linters-common is
removed from the package database when a bindist is created.

This fixes issues caused by infinite recursion due to bytestring adding
a dependency on template-haskell.

Fixes #21634

0 files changed, 0 insertions, 0 deletions