Update semconv to 1.20.0

[lmolkova]

Description

Onboards instrumentations to fresh semantic conventions

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• Run instrumentation tests

Does This PR Require a Core Repo Change?

• Yes. - Link to PR: Update semconv to 1.21.0 opentelemetry-python#3251
• No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[lmolkova]

this PR is ready for the review, @opentelemetry-python-contrib-approvers please take a look!

[ocelotl]

Thanks, @lmolkova, I am trying to debug the failing tests in the core repo.

[lmolkova]

@ocelotl it seems core tests fail on span name check.
AssertionError: '"name": "HTTP GET"' not found in ... "name": "GET"

Span names were changed in #1759, but core tests were not updated to reflect it. I'm not sure what was the reason to remove `HTTP " from client span names, LMK what should be fixed - the name or the core tests. It seems the spec has changed - I'll update core tests. Thanks!

[ocelotl]

@ocelotl it seems core tests fail on span name check. AssertionError: '"name": "HTTP GET"' not found in ... "name": "GET"

Span names were changed in #1759, but core tests were not updated to reflect it. I'm not sure what was the reason to remove `HTTP " from client span names, LMK what should be fixed - the name or the core tests. Thanks!

Right, I just filed this issue, will take care of it, thanks!

[srikanthccv]

I think @lzchen had some points around the transition plan. Bringing this up in the SIG meeting (again) might be a good idea.

[ocelotl]

I think @lzchen had some points around the transition plan. Bringing this up in the SIG meeting (again) might be a good idea.

Added to the SIG notes.

[lmolkova]

Closing this one.

Schema URL is populated in #1977, and @lzchen will prototype side-by-side new/old semconv in selected instrumentations