PF Ethernet Sensor bridge peoplenet and bodypose app support

[sunny9661]

This PR adds peoplenet and bodypose examples support for Microchip PF boards using IMX477 using Linux sockets

[p-ogrady]

Thanks for your code submission! Code that gets included in the public repo must have test fixture, ensuring that it runs with "pytest". Please add two new tests that invoke the examples provided here. To do this,

• Borrow the content from tests/test_linux_tao_peoplenet.py. Don't forget to update the copyright date appropriately. Note that the test calls the example program with "--frame-limit=300" -- if we reach that number of video frames without a fault then the test passes.
• Change the statement that says "@pytest.mark.skip_unless_imx274" to "@pytest.mark.skip_unless_imx477". Support for that condition is already in the tree. This statement tells the test fixture to skip this test unless it's running on a host that has an IMX477 configuration attached.
• Build and run the demo container
• Run "pytest", show that it passes, and verify that it doesn't run your new IMX477 tests
• Run "pytest --imx477", show that it passes, and verify that it does run your new tests

[p-ogrady]

The date here should just be "2024".

[sunny9661]

Hi,
I have made the necessary changes. Please review
Thanks

[p-ogrady]

Thanks for your submission! I can merge this if 1) these commits are squashed to a single commit and 2) if you can sign that commit. Thanks!