Add EH filters for generic catch(T) blocks

[EgorBo]

Closes #67806
Closes #70400

This PR emits single-block EH filters in front of catch clauses which require runtime lookup for Exception objects

Adds generic exceptions support for NativeAOT

[EgorBo]

/azp run runtime-coreclr outerloop, runtime-coreclr jitstress, runtime-coreclr jitstressregs, runtime-coreclr gcstress0x3-gcstress0xc, runtime-coreclr crossgen2

[azure-pipelines]

Azure Pipelines successfully started running 5 pipeline(s).

[jkotas]

/azp run runtime-extra-platforms

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[EgorBo]

/azp run runtime-coreclr outerloop, runtime-coreclr jitstress, runtime-coreclr jitstressregs, runtime-coreclr gcstress0x3-gcstress0xc, runtime-coreclr crossgen2, runtime-extra-platforms

[azure-pipelines]

Azure Pipelines successfully started running 6 pipeline(s).

[jkotas]

Thank you!

[jakobbotsch]

Just curious if this is measurable for something like Assert.Throws<T> given that it is using the slow runtime lookup here?

[EgorBo]

It turns out Xunit's Assert.Throws doesn't use generic "catch" blocks.

Also, this PR actually improves perf 😮:

static void Main(string[] args) =>
    BenchmarkSwitcher.FromAssembly(typeof(Program).Assembly).Run(args);

[Benchmark]
public void Test()
{
    Throws<DivideByZeroException>(() =>
    {
        int b = 0;
        int x = 100 / b;
    });
}

static void Throws<T>(Action action) where T : Exception
{
    try { action(); }
    catch (T) { return; }
    throw new Exception();
}

by 5%

[EgorBo]

@dotnet/jit-contrib @AndyAyersMS PTAL jit side
Last run of outerloop/stress pipelines didn't find any issues (https://github.com/dotnet/runtime/runs/7492786872)

[AndyAyersMS]

Nit -- you don't need to set this.

Suggested change

filterBb->bbStkTempsIn = tempNum;

[EgorBo]

hm.. I think I had to actually, let me see if CI is happy then

[EgorBo]

/azp run runtime-coreclr outerloop, runtime-coreclr jitstress, runtime-coreclr jitstressregs, runtime-coreclr gcstress0x3-gcstress0xc, runtime-coreclr crossgen2

[azure-pipelines]

Azure Pipelines successfully started running 5 pipeline(s).