Automatically update tool versions

[swiatekm]

Describe the issue you're reporting

Our tool versions are pinned in the Makefile, and we don't have any process for updating them. Ideally this should happen the same way as all other dependencies. Same thing goes for the Golang version we use to build our binaries - it's currently pinned to an arbitrary version in the GHA workflow.

My proposal would be to use renovate for this. It's already used elsewhere in otel - notably the collector contrib repo uses it for dependency management, and it is capable of updating versions embedded in arbitrary files.

I successfully achieved this in my fork. With the following configuration:

• golangci-lint update: Update tool github.com/golangci/golangci-lint/cmd/golangci-lint to v1.62.0 swiatekm/opentelemetry-operator#68
• CI Go version update: Update go version in CI to v1.23.3 swiatekm/opentelemetry-operator#54