test: move container/ into test/

Move the container directory, containing the container definitions
for all the test containers, to test/, where all the other test-
related files are located (with the exception of `Schutzbot`).
Use `test/build-container.sh` to build the container, instead of
replicating that in `test-integration.sh`.

test/container/builder/Dockerfile.fedora

@@ -0,0 +1,21 @@
+FROM docker.io/library/fedora:latest
+
+RUN dnf -y upgrade \
+    && dnf -y \
+            --setopt=fastestmirror=True \
+            --setopt=install_weak_deps=False \
+            install \
+	koji-builder \
+	koji-utils \
+	createrepo_c \
+	postgresql \
+	python3-koji \
+	python3-requests \
+	&& dnf clean all
+
+COPY test/container/builder/kojid.conf /etc/kojid/kojid.conf
+COPY plugins/builder/osbuild.py /usr/lib/koji-builder-plugins/
+COPY test/container/builder/run-kojid.sh /app/run-kojid.sh
+COPY test/container/builder/osbuild.krb5.conf /etc/krb5.conf.d/
+
+ENTRYPOINT /app/run-kojid.sh