Adding a New Sample(s)

Description

pSTL-offload sample demonstrates the offloading of C++ standard parallel algorithms to a SYCL device.

Code Development

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

Security and Legal

[ ] OSPDT Approval (see Project Manager for assistance)
[X] 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