molecule: Disable prerun for build containers.

This disables the generation of the collection using the default
galaxy.yml. The installation of the generated collection fails with
invalid version A.B.C.

The collection is not used when building containers and the generated
collection is not using proper name and namespace in the collection files.

molecule/centos-7-build/molecule.yml

@@ -16,3 +16,4 @@ provisioner:
   name: ansible
   playbooks:
     prepare: ../resources/playbooks/prepare-build.yml
+prerun: false

molecule/centos-8-build/molecule.yml

@@ -16,3 +16,4 @@ provisioner:
   name: ansible
   playbooks:
     prepare: ../resources/playbooks/prepare-build.yml
+prerun: false

molecule/centos-9-build/molecule.yml

@@ -16,3 +16,4 @@ provisioner:
   name: ansible
   playbooks:
     prepare: ../resources/playbooks/prepare-build.yml
+prerun: false

molecule/fedora-latest-build/molecule.yml

@@ -16,3 +16,4 @@ provisioner:
   name: ansible
   playbooks:
     prepare: ../resources/playbooks/prepare-build.yml
+prerun: false