Switch to new apt-get dist-clean command

Dockerfile-curl.template

@@ -1,3 +1,4 @@
+{{ include "shared" -}}
 FROM {{ env.dist }}:{{ env.codename }}
 
 RUN set -eux; \
@@ -26,4 +27,4 @@ RUN set -eux; \
 		tzdata \
 {{ ) else "" end -}}
 	; \
-	rm -rf /var/lib/apt/lists/*
+	{{ apt_get_dist_clean }}

Dockerfile-scm.template

@@ -1,3 +1,4 @@
+{{ include "shared" -}}
 FROM buildpack-deps:{{ env.codename }}-curl
 
 RUN set -eux; \
@@ -18,4 +19,4 @@ if [
 # procps is very common in build systems, and is a reasonably small package
 		procps \
 	; \
-	rm -rf /var/lib/apt/lists/*
+	{{ apt_get_dist_clean }}

Dockerfile.template

@@ -1,3 +1,4 @@
+{{ include "shared" -}}
 FROM buildpack-deps:{{ env.codename }}-scm
 
 RUN set -ex; \
@@ -45,4 +46,4 @@ RUN set -ex; \
 		xz-utils \
 		zlib1g-dev \
 	; \
-	rm -rf /var/lib/apt/lists/*
+	{{ apt_get_dist_clean }}

shared.jq

@@ -0,0 +1,27 @@
+def apt_get_dist_clean:
+	if [
+		# only suites with APT 2.7.8+ have "apt-get dist-clean"
+		# https://tracker.debian.org/news/1492892/accepted-apt-278-source-into-unstable/
+
+		# https://tracker.debian.org/pkg/apt
+		# https://packages.debian.org/apt
+		"trixie", # TODO once 2.7.8 migrates to testing (and images are rebuilt), this should be removed!
+		"bookworm",
+		"bullseye",
+		"buster",
+
+		# https://launchpad.net/ubuntu/+source/apt
+		# https://packages.ubuntu.com/apt
+		"noble", # TODO once 2.7.8+ makes it into devel (and images are rebuilt), this should be removed!
+		"mantic",
+		"lunar",
+		"jammy",
+		"focal",
+
+		empty
+	] | index(env.codename) then
+		"rm -rf /var/lib/apt/lists/*"
+	else
+		"apt-get dist-clean"
+	end
+;