Explicitly give mesh shape and systemDescPath to the pipeline option in ttir->ttnn MLIR conversion.

[ajakovljevicTT]

Currently, we rely on having the default options set when calling the createTTIRToTTNNBackendPipeline in our ModuleBuilder, which translates TTIR to TTNN mlir dialect. This will not be possible for multichip configurations, as we need to explicitly say which for which system descriptor and what shape we will compile our model. Currently, an intermediate solution is given like this:

  mlir::tt::ttnn::TTIRToTTNNBackendPipelineOptions options;
  options.systemDescPath="system_desc.ttsys"; // This is manually copied to our tt-xla repo
  options.meshShape = {1,2};
  mlir::tt::ttnn::createTTIRToTTNNBackendPipeline(ttir_to_ttnn_pm, options);

We need to find a way to get these system descriptors specifically, along with the correct mesh shape.