Allow inplace upgrades of msi

[cyberkov]

I hope this Fixes #1197
Unfortunately I am not able to test this change locally (except for the make build, which doesn't seem to produce the msi).

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: cyberkov / name: Hannes Schaller (be9c93b)
• ✅ login: mowies / name: Moritz Wiesinger (4ae20b6)

[pjanotti]

Thanks @cyberkov! Code changes LGTM, but we need a corresponding .chloggen/ file for the change, let's know if you need pointers for that. After that we should be good to move ahead.

I guess it is a bit hard to test in CI because it will require various steps like creating another user, running as that user, etc. That said you can do a manual validation downloading the MSI with your change from https://github.com/open-telemetry/opentelemetry-collector-releases/actions/runs/18221357537/artifacts/4189207545

[cyberkov]

Hello @pjanotti!

Thank you for the artifact. I successfully verified the in-place upgrade. The changelog file has been added to the PR.

[pjanotti]

Thanks @cyberkov!

[pjanotti]

Failures in CI - Core - GoReleaser / Package tests / Package Tests (rpm) (pull_request) are unrelated to the present changes.