[Instrumentation.SqlClient] Move package from main repository

[Kielek]

Towards open-telemetry/opentelemetry-dotnet#5526

Changes

Please provide a brief description of the changes here.

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

• Appropriate CHANGELOG.md updated for non-trivial changes
• Design discussion issue #
• Changes in public API reviewed

[Kielek]

Open questions

1. CHANGELOG.md - should it contain information about moving from main repository to the contib?
2. What's about component owner file? Should it be unset as for other packages migrated from main repository or do you want to be assugned?

@open-telemetry/dotnet-approvers?

[reyang]

1. CHANGELOG.md - should it contain information about moving from main repository to the contib?

Probably not necessary IMHO. I think including the opentelemetry-dotnet PR link in the commit description is important though.

2. What's about component owner file? Should it be unset as for other packages migrated from main repository or do you want to be assugned?

Not a blocker, leave it as empty for now, folks who have knowledge/experience + are willing to be the owner can claim it in separate PRs.

[vishweshbankwar]

curious why do we need additional using? original file does not have it.

[Kielek]

Upstream - all usages have enable ImplicitUsings. In this repository, this file is also part of OpenTelemetry.Contrib.Tests.Shared. This feature is not enabled so I have to add it manually, but the SqlClient project enables Implicitusings - it requiers additional #pragma disable.

[vishweshbankwar]

This is downgrading the version to 3.1.0?

[Kielek]

Good catch. Handled in 0cf5262.

We should consider unifying Microsoft.Extensions.Options version in this repository. Candidate for separate PR.