Updated openai agents samples to work with latest SDK. #791

Job	Run time
build-lint-test (3.12, ubuntu-latest)	5m 35s
build-lint-test (3.9, windows-latest)	5m 54s
build-lint-test (3.12, macos-intel)	7m 10s
build-lint-test (3.9, macos-arm)	7m 21s
build-lint-test (3.12, macos-arm)	5m 45s
build-lint-test (3.12, windows-latest)	5m 59s
build-lint-test (3.9, macos-intel)	7m 55s
build-lint-test (3.9, ubuntu-latest)	5m 27s
	51m 6s

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