Show the compilation phases

[tungld]

This patch is to show the compilation phases which is helpful when compiling a big model that takes a long time.

This is one example of the printed information:

$ onnx-mlir -mcpu=z16 -maccel=NNPA bert_base_uncased_1.onnx
[1/5] Wed Jul  3 03:36:50 2024 Importing ONNX Model to MLIR Module
[2/5] Wed Jul  3 03:36:51 2024 Compiling and Optimizing MLIR Module
[3/5] Wed Jul  3 03:37:14 2024 Translating MLIR Module to LLVM and Generating LLVM Optimized Bitcode
[4/5] Wed Jul  3 03:37:35 2024 Generating Object from LLVM Bitcode
[5/5] Wed Jul  3 03:37:39 2024 Linking and Generating the Output Shared Library

Starting time is added to each phase so that users know how long the current phase takes

[tungld]

FYI @tehbone

[tehbone]

Is this default behavior or enabled via switch?

[tungld]

Is this default behavior or enabled via switch?

Yes, it's on by default. Let me know if you want a switch or set it off.

[jenkins-droid]

Jenkins Linux s390x Build #15079 [push] Show the compilation pha... started at 20:37

[jenkins-droid]

Jenkins Linux ppc64le Build #14104 [push] Show the compilation pha... started at 20:47

[jenkins-droid]

Jenkins Linux amd64 Build #15074 [push] Show the compilation pha... started at 19:37

[jenkins-droid]

Jenkins Linux amd64 Build #15074 [push] Show the compilation pha... passed after 1 hr 6 min

[jenkins-droid]

Jenkins Linux s390x Build #15079 [push] Show the compilation pha... passed after 1 hr 33 min

[jenkins-droid]

Jenkins Linux ppc64le Build #14104 [push] Show the compilation pha... passed after 2 hr 7 min