WIP: Add coverage

[robberphex]

1. add jacoco to modules
2. upload jacoco reports to codecov

#1555

[robberphex]

This PR is work in progress, and if there is any problem, please feedback here.

[robberphex]

Here is codecov example https://app.codecov.io/github/robberphex/opentelemetry-java-instrumentation/tree/release%2Fcodecov/instrumentation.

[steverao]

This line caused CI running failed, for detail you can refer to https://github.com/open-telemetry/opentelemetry-java-instrumentation/actions/runs/8406624268

[laurit]

Firstly see https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/conventions/src/main/kotlin/otel.jacoco-conventions.gradle.kts Currently we apply the jacoco conventions only to library instrumentations and sdk extensions, you also added it to some javaagent modules, does it actually report meaningful results for these?

[robberphex]

@laurit I noticed otel.jacoco-conventions.gradle.
There's no need to add jacoco again. I am trying to figure out how to aggregate coverage reports.