[trace][bugfix] Check both OTel environ for exporter to PFS

[zhengfeiwang]

Description

New SDK will set different environ (OTEL_EXPORTER_OTLP_TRACES_ENDPOINT), as consumer, need to check both to avoid breaking change.

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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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Testing Guidelines

• Pull request includes test coverage for the included changes.

[github-actions]

promptflow SDK CLI Azure E2E Test Result zhengfei/bugfix/add-otel

  4 files    4 suites   4m 12s ⏱️
243 tests 204 ✅  39 💤 0 ❌
972 runs  816 ✅ 156 💤 0 ❌

Results for commit ac8cd1e.

[github-actions]

SDK CLI Global Config Test Result zhengfei/bugfix/add-otel

6 tests   6 ✅  1m 15s ⏱️
1 suites  0 💤
1 files    0 ❌

Results for commit ac8cd1e.

[github-actions]

Executor Unit Test Result zhengfei/bugfix/add-otel

796 tests   796 ✅  3m 45s ⏱️
  1 suites    0 💤
  1 files      0 ❌

Results for commit ac8cd1e.

[github-actions]

Executor E2E Test Result zhengfei/bugfix/add-otel

246 tests   240 ✅  5m 1s ⏱️
  1 suites    6 💤
  1 files      0 ❌

Results for commit ac8cd1e.

[github-actions]

SDK CLI Test Result zhengfei/bugfix/add-otel

    4 files      4 suites   1h 4m 30s ⏱️
  783 tests   740 ✅  43 💤 0 ❌
3 132 runs  2 960 ✅ 172 💤 0 ❌

Results for commit ac8cd1e.