Fix MSI release

[pjanotti]

The wixl tool required to build the MSI package for Windows was only added to the CI workflows not to the release one.

This change restores the original MSI code from PR #560 and fixes the breaking issue with commit 9143b1e

The problem caused by the initial PR was reported at #560 (comment)

[jpkrohling]

@pjanotti, are you able to test this change on a repository under your account? If you give me permissions on your fork, I can add the license key as env var temporarily to it.

[pjanotti]

@jpkrohling I'll follow up on Slack via DM.

[pjanotti]

Release validated on my fork, thanks @jpkrohling. I disabled docker to avoid the pushing docker images since it was going to fail. Results: https://github.com/pjanotti/opentelemetry-collector-releases/releases

Key jobs:

• Release Core prepare windows 386 - MSI
• Release Core prepare windows amd64 - MSI
• Release Contrib prepare windows 386 - MSI
• Release Contrib prepare windows amd64 - MSI

[jpkrohling]

@mx-psi, if you have ideas for further verification, please let us know. Otherwise, I'll merge this towards the middle of the week.

[mx-psi]

Nothing specific for this PR, feel free to merge if you think it is ready :)

[jpkrohling]

I'll port these changes to my own distributions repo and see how it goes!

[jpkrohling]

Apparently, it worked: https://github.com/jpkrohling/otelcol-distributions/releases/tag/v0.102.3