Rename LLM and Embedding span attributes

[zzn2]

Description

Rename LLM and Embedding span attributes to align with the OpenTelemetry convention.
See #2266 for details.

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• 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.
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• Title of the pull request is clear and informative.
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Testing Guidelines

• Pull request includes test coverage for the included changes.

[github-actions]

SDK CLI Global Config Test Result zhizhu/20240308-rename-llm-span-attributes

2 tests   2 ✅  43s ⏱️
1 suites  0 💤
1 files    0 ❌

Results for commit 27b4599.

♻️ This comment has been updated with latest results.

[github-actions]

promptflow-tracing unit test result zhizhu/20240308-rename-llm-span-attributes

 4 files   4 suites   23s ⏱️
 4 tests  4 ✅ 0 💤 0 ❌
16 runs  16 ✅ 0 💤 0 ❌

Results for commit 27b4599.

♻️ This comment has been updated with latest results.

[github-actions]

Executor Unit Test Result zhizhu/20240308-rename-llm-span-attributes

754 tests   754 ✅  55s ⏱️
  1 suites    0 💤
  1 files      0 ❌

Results for commit 27b4599.

♻️ This comment has been updated with latest results.

[github-actions]

promptflow SDK CLI Azure E2E Test Result zhizhu/20240308-rename-llm-span-attributes

  4 files    4 suites   3m 44s ⏱️
168 tests 149 ✅ 19 💤 0 ❌
672 runs  596 ✅ 76 💤 0 ❌

Results for commit 27b4599.

♻️ This comment has been updated with latest results.

[github-actions]

Executor E2E Test Result zhizhu/20240308-rename-llm-span-attributes

211 tests   209 ✅  7m 24s ⏱️
  1 suites    2 💤
  1 files      0 ❌

Results for commit 27b4599.

♻️ This comment has been updated with latest results.

[github-actions]

SDK CLI Test Result zhizhu/20240308-rename-llm-span-attributes

   12 files     12 suites   41m 50s ⏱️
  451 tests   434 ✅ 17 💤 0 ❌
1 804 runs  1 736 ✅ 68 💤 0 ❌

Results for commit 27b4599.

♻️ This comment has been updated with latest results.

[github-actions]

promptflow-tracing e2e test result zhizhu/20240308-rename-llm-span-attributes

 4 files   4 suites   1m 45s ⏱️
 8 tests  8 ✅ 0 💤 0 ❌
32 runs  32 ✅ 0 💤 0 ❌

Results for commit 27b4599.

♻️ This comment has been updated with latest results.