[MLIR] Implement remark emitting policies in MLIR (#161202)

This update introduces two new remark emitting policies:
1. `RemarkEmittingPolicyAll`, which emits all remarks,
2. `RemarkEmittingPolicyFinal`, which only emits final remarks after
processing.

The `RemarkEngine` is modified to support these policies, allowing for
more flexible remark handling based on user configuration.

PR also adds flag to `mlir-opt`
```
  --remark-policy=<value>                                    - Specify the policy for remark output.
    =all                                                     -   Print all remarks
    =final                                                   -   Print final remarks
```

Relanding https://github.com/llvm/llvm-project/pull/160526

This PR requires RemarkEngine to be finalize manually. So here is usage:
```
MLIRContext ctx;
ctx.setRemarkEngine(...)
...
ctx.getRemarkEngine().shutdown() <-- PR adds this, it is required when the emission policy is final
```

0 files changed, 0 insertions, 0 deletions