Disable centos production repo, keep only development enabled.

Just removing the repo file won't help because it would get pulled back
in on 'dnf update -i'.

The issue this patch is trying to resolve is older version of package in
developemnt CentOS repository than in the production CentOS repository.
For example for gtk package:

Error:
 Problem 1: package gtk3-devel-docs-3.24.43-2.el10.x86_64 from
crb-development requires gtk3 = 3.24.43-2.el10, but none of the
providers can be installed
  - cannot install both gtk3-3.24.43-3.el10.x86_64 from appstream and
    gtk3-3.24.43-2.el10.x86_64 from appstream-development
  - cannot install both gtk3-3.24.43-3.el10.x86_64 from appstream and
    gtk3-3.24.43-2.el10.x86_64 from appstream
  - package gtk3-devel-3.24.43-3.el10.x86_64 from appstream requires
    gtk3(x86-64) = 3.24.43-3.el10, but none of the providers can be
installed
  - cannot install the best candidate for the job
  - conflicting requests

dockerfile/anaconda-rpm/Dockerfile

@@ -23,7 +23,6 @@ LABEL [email protected]
 
 # Add development repositories instead of the production ones
 # We need development repositories to get our dependencies sooner
-RUN rm -f /etc/yum.repos.d/*.repo
 COPY ["anaconda-centos.repo", "/etc/yum.repos.d/"]
 
 # The anaconda.spec.in is in the repository root. This file will be copied automatically here if
@@ -32,6 +31,7 @@ COPY ["anaconda.spec.in", "requirements.txt", "/root/"]
 
 # Prepare environment and install build dependencies
 RUN set -ex; \
+  dnf config-manager --disable baseos appstream crb; \
   dnf update -y; \
   # Install dependencies
   dnf install -y \