[Internal] Upload the events in span to Blob.

[riddlexu]

Description

In this PR, we upload the events in span to blob.

• Init the BlobClient.
  • The azureml uri has pattern "azureml://subscriptions/$sub/resourcegroups/$rg/workspaces/$ws/datastores/$storename/paths/.promptflow/.trace/$collection_id/$trace_id/$span_id/$id"
  • We cannot get the datastore name from blob client. Blob client only has container name, so we need to get the base uri including datastore name in collector, and pass it to span client.
  • Get default datastore may take 2~5s. So, we add a cache.
• Upload event to blob and add the azureml uri to "external_event_data_uris".
• Clear the "attributes" in event to reduce the span size.

Test case: query link

Remainder: To upload data to blob, user need to have the role "Storage Blob Data Contributor" to the storage account of workspace.

[github-actions]

SDK CLI Global Config Test Result users/yangtongxu/writeEventToBlob

3 tests   3 ✅  45s ⏱️
1 suites  0 💤
1 files    0 ❌

Results for commit 64407e2.

♻️ This comment has been updated with latest results.

[github-actions]

promptflow SDK CLI Azure E2E Test Result users/yangtongxu/writeEventToBlob

  4 files    4 suites   3m 59s ⏱️
201 tests 181 ✅ 20 💤 0 ❌
804 runs  724 ✅ 80 💤 0 ❌

Results for commit 64407e2.

♻️ This comment has been updated with latest results.

[github-actions]

SDK CLI Test Result users/yangtongxu/writeEventToBlob

   12 files     12 suites   48m 37s ⏱️
  507 tests   488 ✅ 19 💤 0 ❌
2 028 runs  1 952 ✅ 76 💤 0 ❌

Results for commit 64407e2.

♻️ This comment has been updated with latest results.