HasDefaultSchema is ignored for tables created with TPC mapping

[Dubzer]

File a bug

I've been trying to configure TPC mapping with EF Core 7.0.2 and seem to encounter the following bug:

When applying .UseTpcMappingStrategy() to the entity, which is an abstract class, all defined children ignore previously specified modelBuilder.HasDefaultSchema().
Although I only checked with PostgreSQL, I've tried to debug this and I'm pretty sure it should be reproducible with any DBMS.

Minimal repro code

using Microsoft.EntityFrameworkCore;

public abstract class SomeEntity { public int Id { get; set; } }
public class SomeChildEntity : SomeEntity { }
public class OtherEntity { public int Id { get; set; } }

public class TestContext : DbContext
{
    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseNpgsql("Host=localhost;Port=49153;Database=test;Username=postgres;Password=postgrespw");
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.HasDefaultSchema("test_schema");
        modelBuilder.Entity<SomeEntity>().UseTpcMappingStrategy();
        modelBuilder.Entity<SomeChildEntity>();
        modelBuilder.Entity<OtherEntity>();
    }
}

Then run migration

new TestContext().Database.EnsureCreated();

The result of this code should be the following structure, where SomeChildEntity is created in database's default schema instead of specified "test_schema", while OtherEntity is created in expected schema

Include provider and version information

EF Core version: 7.0.2
Database provider: Npgsql.EntityFrameworkCore.PostgreSQL
Target framework: net7.0

[roji]

Duplicate of #29899.