[CI] Update Linux Dockerfiles (#6894)

- Install the distribution's gtest (libgtest-dev / gtest-devel) in the
  Debian, Ubuntu and Fedora images, so configuring the test suite no
  longer downloads googletest; Arch already had it.
- Drop the toolchain meta packages. g++, Ninja and cmake are all that is
  used, and make is not: Ninja is the generator on every Linux leg. The
  DEB legs keep dpkg-dev, which CPack needs for dpkg-shlibdeps when
  CPACK_DEBIAN_PACKAGE_SHLIBDEPS is on.
- Use the slim Debian bases and install Fedora packages with --nodocs.
- Define the global rng in the tests that pull the server game classes
  out of server_remote, as the other server tests already do. Debian's
  libgtest.a leaves a std::string reference undefined, so the linker
  drags server_protocolhandler.cpp and the classes behind it into any
  test that links the library, and those need the symbol.

git, ca-certificates, libcurl and OpenSSL stay: sentry-native is cloned
over git at configure time on every packaging leg, and OpenSSL also backs
CryptoUtil. mariadb-devel stays on Fedora for the same reason it is
installed elsewhere: without it Servatrice configures successfully but
silently loses its MySQL connector.

Co-authored-by: Lukas Brübach <44814898+BruebachL@users.noreply.github.com>

.ci/Arch/Dockerfile

@@ -1,9 +1,9 @@
-from archlinux:latest
+FROM archlinux:latest
 
 RUN pacman --sync --refresh --sysupgrade --needed --noconfirm \
-        base-devel \
         ccache \
         cmake \
+        gcc \
         git \
         gtest \
         mariadb-libs \

.ci/Debian12/Dockerfile

@@ -1,16 +1,17 @@
-FROM debian:12
+FROM debian:12-slim
 
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
-        build-essential \
         ca-certificates \
         ccache \
         cmake \
+        dpkg-dev \
         file \
         g++ \
         git \
         libcurl4-openssl-dev \
         libgl-dev \
+        libgtest-dev \
         liblzma-dev \
         libmariadb-dev-compat \
         libprotobuf-dev \

.ci/Debian13/Dockerfile

@@ -1,16 +1,17 @@
-FROM debian:13
+FROM debian:13-slim
 
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
-        build-essential \
         ca-certificates \
         ccache \
         cmake \
+        dpkg-dev \
         file \
         g++ \
         git \
         libcurl4-openssl-dev \
         libgl-dev \
+        libgtest-dev \
         liblzma-dev \
         libmariadb-dev-compat \
         libprotobuf-dev \

.ci/Fedora44/Dockerfile

@@ -1,11 +1,12 @@
 FROM fedora:44
 
-RUN dnf install -y \
+RUN dnf install -y --nodocs \
         ca-certificates \
         ccache \
         cmake \
         gcc-c++ \
         git \
+        gtest-devel \
         libcurl-devel \
         mariadb-devel \
         ninja-build \

.ci/Fedora45/Dockerfile

@@ -1,11 +1,12 @@
 FROM fedora:45
 
-RUN dnf install -y \
+RUN dnf install -y --nodocs \
         ca-certificates \
         ccache \
         cmake \
         gcc-c++ \
         git \
+        gtest-devel \
         libcurl-devel \
         mariadb-devel \
         ninja-build \

.ci/Servatrice_Debian12/Dockerfile

@@ -1,10 +1,10 @@
-FROM debian:12
+FROM debian:12-slim
 
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
-        build-essential \
         ccache \
         cmake \
+        dpkg-dev \
         file \
         g++ \
         git \

.ci/Ubuntu24.04/Dockerfile

@@ -2,15 +2,16 @@ FROM ubuntu:24.04
 
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
-        build-essential \
         ca-certificates \
         ccache \
         cmake \
+        dpkg-dev \
         file \
         g++ \
         git \
         libcurl4-openssl-dev \
         libgl-dev \
+        libgtest-dev \
         liblzma-dev \
         libmariadb-dev-compat \
         libprotobuf-dev \

.ci/Ubuntu26.04/Dockerfile

@@ -2,16 +2,17 @@ FROM ubuntu:26.04
 
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
-        build-essential \
         ca-certificates \
         ccache \
         cmake \
+        dpkg-dev \
         file \
         g++ \
         gcovr \
         git \
         libcurl4-openssl-dev \
         libgl-dev \
+        libgtest-dev \
         liblzma-dev \
         libmariadb-dev-compat \
         libprotobuf-dev \

tests/latency_tracker_test.cpp

@@ -3,8 +3,12 @@
 #include <gtest/gtest.h>
 #include <initializer_list>
 #include <libcockatrice/network/client/abstract/latency_tracker.h>
+#include <libcockatrice/rng/rng_abstract.h>
 #include <string>
 
+// Referenced by other translation units in the server_remote library.
+RNG_Abstract *rng = nullptr;
+
 TEST(LatencyTrackerTest, EmptyTrackerYieldsZeroedStats)
 {
     LatencyTracker tracker;

tests/loader_local_matching_test.cpp

@@ -23,10 +23,14 @@
 #include <libcockatrice/card/printing/exact_card.h>
 #include <libcockatrice/card/set/card_set.h>
 #include <libcockatrice/interfaces/noop_card_set_priority_controller.h>
+#include <libcockatrice/rng/rng_abstract.h>
 #include <libcockatrice/settings/paths_settings.h>
 #include <qnamespace.h>
 #include <string>
 
+// Referenced by other translation units in the server_remote library.
+RNG_Abstract *rng = nullptr;
+
 namespace
 {
 

tests/server_counter_test.cpp

@@ -8,9 +8,13 @@
 #include <QString>
 #include <gtest/gtest.h>
 #include <libcockatrice/network/server/remote/game/server_counter.h>
+#include <libcockatrice/rng/rng_abstract.h>
 #include <limits>
 #include <string>
 
+// Referenced by other translation units in the server_remote library.
+RNG_Abstract *rng = nullptr;
+
 TEST(ServerCounter, IncrementDoesNotOverflow)
 {
     Server_Counter c(1, "test", color(), 10, std::numeric_limits<int>::max());