test: Fix Terraform Docker container

Terraform Docker container was trying to use python3.9 on AL2,
which doesn't exist. Migrate to AL2023, which already has
python3.9 installed (so we don't even need to install it)

tests/integration/testdata/buildcmd/terraform/build_image_docker/Dockerfile

@@ -1,9 +1,7 @@
-FROM public.ecr.aws/amazonlinux/amazonlinux:2
+FROM public.ecr.aws/amazonlinux/amazonlinux:2023
 
 RUN yum -y update \
-    && yum install -y unzip tar gzip bzip2-devel ed gcc gcc-c++ gcc-gfortran \
-    less libcurl-devel openssl openssl-devel readline-devel xz-devel \
-    zlib-devel glibc-static libcxx libcxx-devel llvm-toolset-7 zlib-static \
+    && yum install -y unzip tar gzip ed less \
     && rm -rf /var/cache/yum
 
 RUN yum -y install make \
@@ -15,11 +13,9 @@ RUN yum install -y yum-utils \
     && terraform --version
 
 # AWS Lambda Builders
-RUN amazon-linux-extras enable python3.9
-RUN yum clean metadata && yum -y install python3.9
+# AL2023 uses Python3.9 by default. This might fail in the future if that changes. We just need the proper version
 RUN curl -L get-pip.io | python3.9
 RUN pip3 install aws-lambda-builders
-RUN ln -s /usr/bin/python3.9 /usr/bin/python3
 RUN python3 --version
 
 VOLUME /project