Add tracing support for Conv2D example

[asyms]

This PR adds support for tracing in the Conv2D example in programming_examples/ml/conv2d.

It updates:

• aie2.py to set up a packet-based tracing flow
• test.py to correctly separate the data and tracing buffers
• Makefile to add new make rules for tracing

All changes were done accordingly to how the tracing is setup for the programming_examples/basic/vector_scalar_mul.

One caveat: Compilation for Conv2D doesn't function (for me) without adding the AIETOOLS_DIR/include to the programming_examples/makefile-common. Not sure if this is a common issue or if something is wrong on my end regarding my peano install.

[asyms]

Can you please enable testing of the trace functionality in the lit test?

@jgmelber Is this directed at me or Jack because if me I have no idea how to go about this.

[jackl-xilinx]

@asyms I can push the change if you give me permission to push to your branch. For reference, it needs code similar to https://github.com/Xilinx/mlir-aie/blob/main/programming_examples/basic/vector_scalar_mul/run_makefile.lit#L14

[asyms]

@jackl-xilinx Thanks! I have invited you, should have push access once you accept.