Redo binary exporter column reading (npgsql#5464)

Fixes npgsql#5457

(cherry picked from commit cdf9841)

Bump version to 8.0.0

Bump dotnet SDK to 8.0.0-rc.2 (npgsql#5325)

Test against PG16 in CI (npgsql#5262)

(cherry picked from commit fcebb3a)

Ignore replication test

Which generates a different exception on different PG versions

Ignoring test failing probably because of environmental issues

Upgrade to .NET 8 preview 4 (npgsql#5060)

Fix deadlock while cancelling a query (npgsql#5033)

Fixes npgsql#5032

Fix deadlock while cancelling a query (npgsql#5033)

Fixes npgsql#5032

(cherry picked from commit 276bb7d)

Split TypeMapperResolver from TypeHandlerResolver (npgsql#4973)

Closes npgsql#4972