Fix dataflow analysis for MakeGenericType/MakeGenericMethod in local methods

[Copilot]

Description

Dataflow analysis associates MakeGenericTypeSite/MakeGenericMethodSite runtime dependencies with the parent user method, but SearchDynamicDependencies only matches compiled method bodies against that parent. When the MakeGenericType call lives in a compiler-generated local method, the local method's GetTypicalMethodDefinition() differs from the parent, so the dependency is never instantiated.

MakeGeneric<Atom>();

// This local method's MakeGenericTypeSite was never matched in SearchDynamicDependencies
static object MakeGeneric<T>() => Activator.CreateInstance(typeof(Gen<>).MakeGenericType(typeof(T)));

class Gen<T>;
struct Atom;

Fix: Track which method each runtime dependency originated from and match against it:

• ReflectionMarker.RuntimeDeterminedDependencies now stores (MethodDesc OwningMethod, INodeWithRuntimeDeterminedDependencies Dependency) tuples
• HandleCallAction tags each MakeGenericTypeSite/MakeGenericMethodSite with _callingMethod
• DataflowAnalyzedMethodNode.SearchDynamicDependencies matches each marked method body's typical definition against the dependency's owning method, rather than only the analyzed parent method

Added regression test TestMakeGenericDataflowInLocalMethod covering both MakeGenericType and MakeGenericMethod from static local methods.

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[Copilot]

Pull request overview

Fixes NativeAOT dataflow/runtime-dependency instantiation for MakeGenericType/MakeGenericMethod when the intrinsic call occurs in compiler-generated nested functions (e.g., local methods), by tracking which method a runtime dependency originated from and matching specializations against that method.

Changes:

• Track runtime-determined dependencies as (OwningMethod, Dependency) pairs and record the calling method when creating MakeGenericTypeSite/MakeGenericMethodSite.
• Update dynamic dependency instantiation to match against each marked method body’s typical definition (including compiler-generated nested functions).
• Add a regression smoke test covering MakeGenericType and MakeGenericMethod from static local methods.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/tests/nativeaot/SmokeTests/TrimmingBehaviors/Dataflow.cs	Adds regression test exercising MakeGenericType/MakeGenericMethod inside static local methods.
src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/DependencyAnalysis/DataflowAnalyzedMethodNode.cs	Matches and instantiates runtime deps based on recorded owning method rather than only the parent analyzed method.
src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/Dataflow/ReflectionMethodBodyScanner.cs	Updates scan API to return owning-method-tagged runtime dependencies.
src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/Dataflow/ReflectionMarker.cs	Stores runtime-determined dependencies with their owning method.
src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/Dataflow/HandleCallAction.cs	Tags MakeGenericTypeSite/MakeGenericMethodSite runtime deps with the calling method.