use eToken for signing

[umbynos]

Please check if the PR fulfills these requirements

• The PR has no duplicates (please search among the Pull Requests
  before creating one)
• Tests for the changes have been added (for bug fixes / features)

• What kind of change does this PR introduce?

Infra change

• What is the current behavior?

The certificate used to sign windows binaries is expiring, and the provider no longer ships a digital one.

• What is the new behavior?

We have setup a local runner used to sign. I created a job specifically for this and removed code-signing from the package step, because this requires a local windows runner, while the package one runs on ubuntu container.

• Does this PR introduce a breaking change?

no

• Other information:

TODO:

• Remove INSTALLER_CERT_WINDOWS_PFX and use INSTALLER_CERT_WINDOWS_CER
• Replace INSTALLER_CERT_WINDOWS_PASSWORD
• Add INSTALLER_CERT_WINDOWS_CONTAINER

[MatteoPologruto]

LGTM

[umbynos]

I've adapted check-certificates.yml too in order to correctly validate the new Windows certificate. This needs to be mirrored to the assets repo
Test release can be found here and run here