[Bugfix][Executor] Fix the issue of duplicate line numbers in the chat group run scenario

[PeiwenGaoMS]

Description

In a chat group run, the line_number remains consistent within each round, which can lead to the current flow run within a round possibly getting the result of the previous one. To ensure the uniqueness of each request and retrieve the correct execution results, we use request_id (uuid) as the key for the result dictionary.

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• The pull request does not introduce [breaking changes].
• CHANGELOG is updated for new features, bug fixes or other significant changes.
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Testing Guidelines

• Pull request includes test coverage for the included changes.

[github-actions]

promptflow SDK CLI Azure E2E Test Result devs/peiwen/fix_chatgroup_run

  4 files    4 suites   4m 10s ⏱️
242 tests 205 ✅  37 💤 0 ❌
968 runs  820 ✅ 148 💤 0 ❌

Results for commit 9b639b8.

♻️ This comment has been updated with latest results.

[github-actions]

SDK CLI Global Config Test Result devs/peiwen/fix_chatgroup_run

6 tests   6 ✅  1m 14s ⏱️
1 suites  0 💤
1 files    0 ❌

Results for commit 9b639b8.

♻️ This comment has been updated with latest results.

[github-actions]

promptflow-core test result

0 tests   0 ✅  0s ⏱️
0 suites  0 💤
0 files    0 ❌

Results for commit 9b639b8.

♻️ This comment has been updated with latest results.

[github-actions]

Executor Unit Test Result devs/peiwen/fix_chatgroup_run

796 tests   796 ✅  3m 46s ⏱️
  1 suites    0 💤
  1 files      0 ❌

Results for commit 9b639b8.

♻️ This comment has been updated with latest results.

[github-actions]

Executor E2E Test Result devs/peiwen/fix_chatgroup_run

243 tests   238 ✅  5m 24s ⏱️
  1 suites    5 💤
  1 files      0 ❌

Results for commit 9b639b8.

♻️ This comment has been updated with latest results.

[github-actions]

SDK CLI Test Result devs/peiwen/fix_chatgroup_run

    4 files      4 suites   1h 3m 35s ⏱️
  715 tests   674 ✅  41 💤 0 ❌
2 860 runs  2 696 ✅ 164 💤 0 ❌

Results for commit 9b639b8.

♻️ This comment has been updated with latest results.