[NFC][SYCL] Raw context_impl in getInteropContext and queue_impl ctor

[aelovikov-intel]

Splitting into two PRs would result in unnecessary temporarily adjustments and merge conflicts later on between these changes, so perform in a single PR. They are both small enough anyway.

Continuation of the refactoring in
#18795
#18877
#18966
#18979
#18980
#18981
#19007
#19030
#19123

[aelovikov-intel]

Changes in this file because of this queue_impl creation.

[aelovikov-intel]

Need the rvalue-reference overload for the creation using getDefaultOrNew helper at line 108. Maybe this can be refactored further somehow, but that would be independent of passing SYCL RT objects by raw ptr/ref.

[uditagarwal97]

LGTM

[Copilot]

Pull Request Overview

This PR refactors context handling in interop constructs by switching from shared_ptr-based interfaces to raw context_impl* or references in getInteropContext and queue_impl constructors, and updates all call sites accordingly.

• Change getInteropContext() to return a raw pointer instead of shared_ptr
• Update queue_impl constructors to accept context_impl& and manage ownership internally
• Adjust all instantiations and interop uses to dereference or call .get() on the existing smart pointer

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
sycl/unittests/scheduler/LinkedAllocaDependencies.cpp	Mock’s getInteropContext() signature updated
sycl/unittests/scheduler/HostTaskAndBarrier.cpp	TestQueueImpl ctor uses context_impl&
sycl/source/queue.cpp	Queue ctors now pass *getSyclObjImpl(SyclContext)
sycl/source/detail/sycl_mem_obj_t.hpp	Base memobj returns raw pointer; member holds shared_ptr
sycl/source/detail/sycl_mem_obj_i.hpp	Interface updated to raw pointer return type
sycl/source/detail/scheduler/graph_builder.cpp	Use raw pointer from getInteropContext()
sycl/source/detail/queue_impl.hpp	Ctor overloads changed to reference and moved ownership
sycl/source/detail/graph_impl.cpp	exec_graph_impl uses raw context reference
sycl/source/backend.cpp	make_queue now dereferences context_impl pointer

Comments suppressed due to low confidence (1)

sycl/source/backend.cpp:129

• [nitpick] The variable name ContextImpl is identical to the type and uses uppercase; consider renaming it to ctxImpl or contextImpl to follow variable naming conventions and avoid confusion.

  context_impl &ContextImpl = *getSyclObjImpl(Context);