fix(releasing): add libsasl2-2 runtime dep to Debian-based images (#24962)

fix(docker): add libsasl2-2 runtime dep to Debian-based images

After fd766a0 switched rdkafka from gssapi-vendored (static) to
gssapi (dynamic linking), the vector binary now requires libsasl2.so.2
at runtime. The Debian final stages in both the distribution and
regression Dockerfiles were missing this package, causing the
smoke-test RUN to fail with:

  /usr/bin/vector: error while loading shared libraries: libsasl2.so.2

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: vladimir-dd

distribution/docker/debian/Dockerfile

@@ -16,7 +16,7 @@ LABEL org.opencontainers.image.documentation="https://vector.dev/docs"
 
 # we want the latest versions of these
 # hadolint ignore=DL3008
-RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates tzdata systemd && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates tzdata systemd libsasl2-2 && rm -rf /var/lib/apt/lists/*
 
 COPY --from=builder /usr/bin/vector /usr/bin/vector
 COPY --from=builder /usr/share/vector /usr/share/vector

regression/Dockerfile

@@ -14,7 +14,7 @@ RUN --mount=type=cache,target=/usr/local/cargo/registry \
 # TARGET
 #
 FROM docker.io/debian:trixie-slim@sha256:c85a2732e97694ea77237c61304b3bb410e0e961dd6ee945997a06c788c545bb
-RUN apt-get update && apt-get dist-upgrade -y && apt-get -y --no-install-recommends install zlib1g ca-certificates && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get dist-upgrade -y && apt-get -y --no-install-recommends install zlib1g ca-certificates libsasl2-2 && rm -rf /var/lib/apt/lists/*
 COPY --from=builder /vector/vector /usr/bin/vector
 RUN mkdir --parents --mode=0777 /var/lib/vector