[SEMANTIC CONVENTIONS] Upgrade to version 1.26.0

[marcalff]

Fixes # (issue)

Changes

Please provide a brief description of the changes here.

• Upgraded to semantic conventions release v1.26.0
• Implemented a workaround for a C++ name collision:
  • deprecated semconv messaging.client_id is generated as kMessagingClientId
  • semconv messaging.client.id is generated as kMessagingClientId
  • removed code generation for messaging.client_id

See related:

• https://github.com/open-telemetry/semantic-conventions/issues/1031

For significant contributions please make sure you have completed the following items:

• [ ] CHANGELOG.md updated for non-trivial changes
• [ ] Unit tests have been added
• [ ] Changes in public API reviewed

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.68%. Comparing base (497eaf4) to head (1ac80cc). Report is 71 commits behind head on main.

Additional details and impacted files

[](https://app.codecov.io/gh/open-telemetry/opentelemetry-cpp/pull/2687?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry) ```diff @@ Coverage Diff @@ ## main #2687 +/- ## ========================================== + Coverage 87.12% 87.68% +0.56% ========================================== Files 200 190 -10 Lines 6109 5849 -260 ========================================== - Hits 5322 5128 -194 + Misses 787 721 -66 ``` [see 58 files with indirect coverage changes](https://app.codecov.io/gh/open-telemetry/opentelemetry-cpp/pull/2687/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry)

[lalitb]

btw used similar workaround for otel-rust - https://github.com/open-telemetry/opentelemetry-rust/pull/1851 :)