Make a GDExtension build for all supported platforms

Workflow runs for Make a GDExtension build for all supported platforms

• Split CI from build actions, since they're for pretty different use-cases

  cancelled:
  Make a GDExtension build for all supported platforms#2:Pull request#101synchronizebyIvorforce
  Ivorforce:ci-cd-builds

  Oct 25, 20253m 7s
  More actions for workflow run 2

• Split CI from build actions, since they're for pretty different use-cases

  cancelled:
  Make a GDExtension build for all supported platforms#1:Pull request#101openedbyIvorforce
  Ivorforce:ci-cd-builds

  Oct 25, 20255m 51s
  More actions for workflow run 1