Add 17.1 images (#159)

PG17: Bison and Flex are now hard build requirements in configure

postgres/postgres@721856f

Sister PR citusdata/citus#7661

Author: naisila

circleci/images/PG_VERSIONS

@@ -1,3 +1,4 @@
 PG14=14.14
 PG15=15.9
 PG16=16.5
+PG17=17.1

circleci/images/exttester/Dockerfile

@@ -32,6 +32,8 @@ apt-get install -y --no-install-recommends \
     locales \
     make \
     perl \
+    bison \
+    flex \
 
 # clear apt cache
 rm -rf /var/lib/apt/lists/*
@@ -120,6 +122,8 @@ apt-get install -y --no-install-recommends \
     locales \
     make \
     perl \
+    bison \
+    flex \
 
 # clear apt cache
 rm -rf /var/lib/apt/lists/*