refine the error/message for run_tracker.py

[chw-microsoft]

Description

Update the error message at run_tracker.py, to make it more concise and actionable

All Promptflow Contribution checklist:

• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.

General Guidelines and Best Practices

• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

• Pull request includes test coverage for the included changes.

[github-actions]

Executor Unit Test Result chw/pf/run_tracker_error

    2 files      2 suites   36s ⏱️
161 tests 161 ✔️ 0 💤 0 ❌
322 runs  321 ✔️ 1 💤 0 ❌

Results for commit 0a916f1.

♻️ This comment has been updated with latest results.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
10908	8304	76%	40%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
src/promptflow/promptflow/_core/_errors.py	93%	🟢
src/promptflow/promptflow/_core/run_tracker.py	83%	🟢
TOTAL	88%	🟢

updated for commit: 0a916f1 by action🐍

[github-actions]

Executor E2E Test Result chw/pf/run_tracker_error

    2 files      2 suites   6m 23s ⏱️
  92 tests   90 ✔️ 2 💤 0 ❌
184 runs  178 ✔️ 6 💤 0 ❌

Results for commit 0a916f1.

♻️ This comment has been updated with latest results.

[github-actions]

SDK CLI Test Result chw/pf/run_tracker_error

    2 files      2 suites   19m 11s ⏱️
207 tests 194 ✔️ 13 💤 0 ❌
414 runs  388 ✔️ 26 💤 0 ❌

Results for commit 0a916f1.

♻️ This comment has been updated with latest results.