Fix CultureNotFoundException when InvariantGlobalization is enabled

[ptupitsyn]

Fixes #1126 .

Starting with .NET 6, when InvariantGlobalization is enabled, CultureInfo constructor throws CultureNotFoundException for all cultures except invariant: https://docs.microsoft.com/en-us/dotnet/core/compatibility/globalization/6.0/culture-creation-invariant-mode

• Handle CultureNotFoundException when creating the default formatter.
• Skip other cultures when there was an exception for en-US.

[dnfadmin]

All CLA requirements met.

[ThumbGen]

Any reason for not accepting this useful PR?

[gurustron]

@clairernovotny @MehdiK @hazzik can we please have this merged?

[ahmadalli]

@clairernovotny @MehdiK @hazzik Would you please take a look at this PR if you've got the time?

[SimonCropp]

@ptupitsyn sorry for the delayed reply. can you rebase. and also add a test for this scenario

[ptupitsyn]

@SimonCropp invariant globalization can only be enabled before the runtime starts: https://learn.microsoft.com/en-us/dotnet/core/runtime-config/globalization

I'm not sure how to test this scenario. Is it ok to spawn a new process?

[SimonCropp]

@ptupitsyn i think the best way is to add a new test project with the following

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <InvariantGlobalization>true</InvariantGlobalization>
  </PropertyGroup>

</Project>

and add a few tests to it. enough to verify the change

[hazzik]

Just a question: how to differentiate between culture not found due, for ex, misspelling, and globalization invariant?

[SimonCropp]

@hazzik perhaps it throws a different exception?