[Test] Update error msg response from backend

[lalala123123]

Description

Please add an informative description that covers that changes made by the pull request and link all relevant issues.

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.
• Create an issue and link to the pull request to get dedicated review from promptflow team. Learn more: suggested workflow.

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]

promptflow SDK CLI Azure E2E Test Result zhrua/fix_prompty_test

  4 files    4 suites   4m 16s ⏱️
243 tests 203 ✅  40 💤 0 ❌
972 runs  812 ✅ 160 💤 0 ❌

Results for commit e210af6.

♻️ This comment has been updated with latest results.

[github-actions]

SDK CLI Global Config Test Result zhrua/fix_prompty_test

6 tests   6 ✅  1m 17s ⏱️
1 suites  0 💤
1 files    0 ❌

Results for commit e210af6.

♻️ This comment has been updated with latest results.

[github-actions]

SDK CLI Test Result zhrua/fix_prompty_test

    4 files      4 suites   1h 6m 54s ⏱️
  784 tests   761 ✅ 23 💤 0 ❌
3 136 runs  3 044 ✅ 92 💤 0 ❌

Results for commit e210af6.

♻️ This comment has been updated with latest results.

[github-actions]

Test Results

    24 files  ±0      24 suites  ±0   2h 25m 56s ⏱️ -23s
 1 052 tests ±0   1 044 ✅ +1    5 💤 ±0  3 ❌  - 1 
12 504 runs  ±0  12 389 ✅ +1  108 💤 ±0  7 ❌  - 1 

For more details on these failures, see this check.

Results for commit 250f62c. ± Comparison against base commit 96dbf33.