Remove unnecessary tracking of unmatched parameters in method invocation escape analysis

[cston]

Fixes #62834.

[cston]

@dotnet/roslyn-compiler, please review.

[RikkiGibson]

It looks like we don't create arguments for params arrays during binding. #49602

Consider testing a case like:

using System;

Span<int> M1(Span<int> input, params object[] arr) { return input; }

Span<int> M2()
{
    return M1(stackalloc int[] { 1, 2, 3 });
}

We might want to adjust this step to ensure that all parameters which may factor into escape analysis have arguments. Or just specifically permit a parameter with IsParams == true && Type.TypeKind == TypeKind.Array here, since that's likely the only kind we will miss.
#Resolved

[cston]

Good catch, thanks.

[cston]

@dotnet/roslyn-compiler, please review a small change to escape analysis, to simplify changes going forward.

[jcouv]

LGTM Thanks (iteration 2)