fix(managed): report InternalCall methods as runtime-provided boundaries (#9547)

* fix(managed): report InternalCall methods as runtime-provided boundaries

inspect_managed_native_boundaries listed P/Invoke, native, runtime and
unmanaged methods, but not methods with MethodImplOptions.InternalCall
(0x1000). The runtime implements those bodies; mscorlib and
System.Private.CoreLib declare hundreds of them as FCalls. They now appear
in native_implementations with boundary_kind runtime-provided.

* fix(managed): keep InternalCall bodies out of CIL decoding

The native-boundary view reports InternalCall methods as runtime-provided.
Body admission still decoded CIL from a nonzero RVA when the row kept IL
and managed flags. CoreCLR rejects such a row (BFA_INTERNAL_METHOD_WITH_RVA).

Body admission now treats InternalCall like the Runtime code type. The
method gets a partial body with no instructions. The InternalCall test
covers both a zero and a nonzero RVA.

* test(javascript): distinguish package scope in route fixtures

* test(apple): separate identity and refusal fixture groups

* fix(managed): honor InternalCall during body admission

---------

Co-authored-by: morluto <76467478+morluto@users.noreply.github.com>

docs/guides/managed/managed-code-analysis.md

@@ -650,7 +650,8 @@ unchanged signature. Comparison retains exact byte-based pairs for malformed
 signatures, including empty, truncated, or invalid headers, but reports them as
 unknown with a `signature-malformed` limitation when no change is observed.
 This applies to historical Evidence without signature-resolution attestation as
-well. Runtime-provided methods are counted separately in
+well. Runtime-provided methods have the Runtime code type or the InternalCall
+implementation flag, as core library FCalls do. They are counted separately in
 `native_implementations.runtime_provided`; they have no file-backed native body
 for this workflow to map and do not increase `native_body_unresolved`. Historical
 verification Evidence without this separate count leaves it unknown (`null`).