Add samples for SYCL-Graph extension

[konradkusiak97]

Adding a New Sample(s)

Description

This PR adds code examples demonstrating the use case of sycl_ext_oneapi_graph extension.

Checklist

Administrative

• Review sample design with the appropriate Domain Expert:
• If you have any new dependencies/binaries, inform the oneAPI Code Samples Project Manager

Code Development

• Implement coding guidelines and ensure code quality. see wiki for details
• Adhere to readme template
• Enforce format via clang-format config file
• Adhere to sample.json specification. https://github.com/oneapi-src/oneAPI-samples/wiki/sample-json-specification
• Ensure/create CI test configurations for sample (ciTests field) https://github.com/oneapi-src/oneAPI-samples/wiki/sample-json-ci-test-object
• Run jsonlint on sample.json to verify json syntax. www.jsonlint.com

Security and Legal

• OSPDT Approval (see Project Manager for assistance)
• Compile using the following compiler flags and fix any warnings, the falgs are: "/Wall -Wformat-security -Werror=format-security"
• Bandit Scans (Python only)
• Virus scan

Review

• Review DPC++ code with Paul Peterseon. (GitHub User: pmpeter1)
• Review readme with Tom Lenth(@tomlenth) and/or Project Manager
• Tested using Dev Cloud when applicable

[konradkusiak97]

pinging @jimmytwei for visibility

[konradkusiak97]

Note that 5 out of 7 samples in here use the Update feature which for intel GPUs is available only with embargoed drivers and hence not available to the users just yet. It's currently possible to use those examples on AMD and Nvidia backends though. AFAIK this will become available in L0 drivers in the coming months. @jimmytwei, What is your preference in terms of adding those limited working samples now or later, when the feature is available for intel gpus?