Cardano Updates

This fixes a string of errors when building static postgresql:

    x86_64-unknown-linux-musl-ld: (.text+0xc73): undefined reference to `pg_xyz'

 * Rollback haskell.nix/nixpkgs updates
 * Update hackage/chap/iohk-nix

In order to match the current naming standard in the ENVs that control the configuration of the Cardano DBSync docker service this commit changes the name of the ENV responsible for config file to `DB_SYNC_CONFIG`.

Fixes https://github.com/IntersectMBO/cardano-db-sync/issues/1779

Fixes https://github.com/IntersectMBO/cardano-db-sync/issues/1779

 * Upgrade postgres libraries @ 14
 * Avoid dropping database in restore script

This commit introduces a new environment variable,
CARDANO_DB_SYNC_CONFIG, allowing users to specify a custom configuration
file for the Cardano db-sync service. The modification in
`nix/nixos/cardano-db-sync-service.nix` adds a conditional check to use
the custom configuration file if the environment variable is set,
providing more flexibility in deployment scenarios and facilitating
custom configurations without altering the base code. This change
addresses a need for dynamic configuration management as specified in
the recent user requirements.

Signed-off-by: Cmdv <[email protected]>