SNOW-1518775: fix connector fips docker image (#1992)

Author: sfc-gh-aling

ci/docker/connector_test_fips/Dockerfile

@@ -1,4 +1,4 @@
-FROM centos:7
+FROM centos:8
 
 # This is to solve permission issue, read https://denibertovic.com/posts/handling-permissions-with-docker-volumes/
 RUN curl -o /usr/local/bin/gosu -SL "https://github.com/tianon/gosu/releases/download/1.14/gosu-amd64"
@@ -12,8 +12,13 @@ RUN chmod 777 /home/user
 
 ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
 
-RUN yum install -y redhat-rpm-config gcc libffi-devel openssl openssl-devel centos-release-scl && \
-    yum install -y rh-python38 rh-python38-python-devel && \
+RUN sed -i s/mirror.centos.org/vault.centos.org/g /etc/yum.repos.d/*.repo && \
+    sed -i s/^#.*baseurl=http/baseurl=http/g /etc/yum.repos.d/*.repo && \
+    sed -i s/^mirrorlist=http/#mirrorlist=http/g /etc/yum.repos.d/*.repo
+
+RUN yum clean all && \
+    yum install -y redhat-rpm-config gcc libffi-devel openssl openssl-devel && \
+    yum install -y python38 python38-devel && \
     yum clean all && \
     rm -rf /var/cache/yum
-RUN scl enable rh-python38 "python3.8 -m pip install --user --upgrade pip setuptools wheel"
+RUN python3 -m pip install --user --upgrade pip setuptools wheel