Combine static_code_analysis.yml with release_notes.yml

[fealho]

Problem Description

Currently, we run the code analysis workflow on merge to stable. The problem is that by this time, the release is already tagged, so it's too late to merge in the code analysis change.

Expected behavior

We should combine the static code analysis workflow with the release notes one into a prepare_release.yml file so that all release related code just gets created in a PR together.