ParserName memory consumption

[Mimetis]

The ParserName object is quite old and I wanted (for a long time) to refactor it, to reduce memory usage.

Here is a benchmark I used to test a quite simple scenario where ParserName is heavily used:

[Benchmark]
[IterationCount(IterationsNum)]
public static async Task ProvisionDeprovision()
{
    var serverProvider = new SqlSyncProvider(ServerConnectionString);
    var clientProvider = new SqlSyncProvider(ClientConnectionString);

    var setup = new SyncSetup("ProductCategory");

    var remoteOrchestrator = new RemoteOrchestrator(serverProvider);

    await remoteOrchestrator.DeprovisionAsync(setup).ConfigureAwait(false);
    await remoteOrchestrator.ProvisionAsync(setup).ConfigureAwait(false);
    await remoteOrchestrator.DeprovisionAsync(setup).ConfigureAwait(false);
}

The idea is to remove ParserName and use some new technic like Span<T> and ref struct to avoid too much GC

Here is the result after a big refactoring:

I'll will come back here to link the commit once everything is done and tests are good :)