[CLI] Repeating trial cancellation message.

**System Information (please complete the following information):**
- CLI Version: 16.12.2+86688637e3ba4b906f5adf37b767fee124189da7
- OS: Windows 11
- Architecture: x64

**Describe the bug**
- On which step of the process did you run into an issue: Training
- Clear description of the problem: When time expires and a trial is running, the trial is cancelled. A message, `Trial 23 encounter error with message: One or more errors occurred. (Operation was canceled.)`, is displayed more than once on the console.

**To Reproduce**
Steps to reproduce the behavior:
1. Train a classification model using the CLI

**Expected behavior**

When a trial is cancelled, only display the message once.

**Screenshots**


**Additional context**

Log file:
[log.txt](https://github.com/dotnet/machinelearning-modelbuilder/files/8018585/log.txt)

首先，使用 CLI 复现分类模型训练期间的取消操作，并将重复的控制台输出与 log.txt 进行比较。跟踪报告 trial 取消错误的位置，然后验证已取消的 trial 只产生一条消息，而不是重复消息。

由索引模型根据 Issue 内容生成。