[BUG] go.mod tidy fails due to unresolved module in dd-trace-go

[klaus-ziegert]

Version of dd-trace-go
gopkg.in/DataDog/dd-trace-go.v1 v1.70.1

Describe what happened:
When adding the following import statement in a Go file:

package main

import _ "gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer"

and running go get -u -t ./... followed by go mod tidy, the following error occurs:

go: downloading k8s.io/apimachinery v0.25.5
go: downloading github.com/rogpeppe/go-internal v1.10.0
go: finding module for package go.opentelemetry.io/collector/pdata/internal/data/protogen/profiles/v1experimental
go: finding module for package go.opentelemetry.io/collector/pdata/internal/data/protogen/collector/profiles/v1experimental
go: test imports
	gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer imports
	github.com/DataDog/datadog-agent/pkg/trace/stats imports
	github.com/DataDog/datadog-agent/pkg/trace/transform imports
	github.com/DataDog/datadog-agent/pkg/trace/sampler tested by
	github.com/DataDog/datadog-agent/pkg/trace/sampler.test imports
	go.opentelemetry.io/collector/processor/processortest imports
	go.opentelemetry.io/collector/pdata/testdata imports
	go.opentelemetry.io/collector/pdata/pprofile imports
	go.opentelemetry.io/collector/pdata/internal/data/protogen/collector/profiles/v1experimental: module go.opentelemetry.io/collector/pdata@latest found (v1.22.0), but does not contain package go.opentelemetry.io/collector/pdata/internal/data/protogen/collector/profiles/v1experimental
go: test imports
	gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer imports
	github.com/DataDog/datadog-agent/pkg/trace/stats imports
	github.com/DataDog/datadog-agent/pkg/trace/transform imports
	github.com/DataDog/datadog-agent/pkg/trace/sampler tested by
	github.com/DataDog/datadog-agent/pkg/trace/sampler.test imports
	go.opentelemetry.io/collector/processor/processortest imports
	go.opentelemetry.io/collector/pdata/testdata imports
	go.opentelemetry.io/collector/pdata/pprofile imports
	go.opentelemetry.io/collector/pdata/internal/data/protogen/profiles/v1experimental: module go.opentelemetry.io/collector/pdata@latest found (v1.22.0), but does not contain package go.opentelemetry.io/collector/pdata/internal/data/protogen/profiles/v1experimental

Describe what you expected:
I expected go mod tidy to resolve all module dependencies and clean up the go.mod and go.sum files without encountering unresolved dependencies.

Steps to reproduce the issue:

Additional environment details (Version of Go, Operating System, etc.):
go version go1.23.4 darwin/arm64