Update http.* and url.* attributes to align with Semantic Conventions

[MustafaHaddara]

Is your feature request related to a problem? Please describe.

In open-telemetry/opentelemetry-specification#3355, a host of http.* attributes were updated. Some got moved under url.*, and others got renamed.

From that PR description:

HTTP:

• http.method -> http.request.method
• http.status_code -> http.response.status_code
• http.request_content_length -> http.request.body.size
• http.response_content_length -> http.response.body.size
• http.url -> url.full
• http.target -> url.path + url.query
• http.scheme -> url.scheme
• http.client_ip -> not in this PR
• http.route -> no change
• http.resend_count -> no change
• http.request.header.<key> - no change
• http.response.header.<key> - no change

The largest change seems to be that http.target gets split into two attributes: url.path & url.query.

Describe the solution you'd like

I think we need to update the attributes we emit so that we are aligned with the Semantic Conventions.

In the SIG meeting today we noted that this change will need to wait for #4690 to get merged first, since that PR brings in the latest version of the semantic conventions, and reworks how we get those attributes.

Describe alternatives you've considered

Ignore the semantic conventions? ¯\_(ツ)_/¯

[JamieDanielson]

@MustafaHaddara this is the current tracking issue for semantic conventions work. We're working on it 😃

• Semantic Convention Update: Tracking Issue #4572

[MustafaHaddara]

Aha thanks! I didn't see that issue.