util-docker,tests: Add compiler tests & Dockerfiles for GCC 14 (#1646)

This commit adds gcc 14 to the compiler tests and Dockerfiles.

util/dockerfiles/docker-bake.hcl

@@ -125,7 +125,8 @@ group "gcc-compilers" {
     "gcc-version-10",
     "gcc-version-11",
     "gcc-version-12",
-    "gcc-version-13"
+    "gcc-version-13",
+    "gcc-version-14"
   ]
 }
 
@@ -169,6 +170,16 @@ target "gcc-version-13" {
   tags = ["${IMAGE_URI}/gcc-version-13:${TAG}"]
 }
 
+target "gcc-version-14" {
+  inherits = ["common"]
+  annotations = ["index,manifest:org.opencontainers.image.description=An image with all dependencies for building gem5 with a GCC v14 compiler."]
+  args = {
+    version = "14"
+  }
+  context = "gcc-compiler"
+  tags = ["${IMAGE_URI}/gcc-version-14:${TAG}"]
+}
+
 group "ubuntu-releases" {
   targets=[
     "ubuntu-24-04_all-dependencies",

util/dockerfiles/gcc-compiler/Dockerfile

@@ -3,7 +3,7 @@ FROM  ghcr.io/gem5/ubuntu-24.04_all-dependencies:latest
 LABEL org.opencontainers.image.source=https://github.com/gem5/gem5
 LABEL org.opencontainers.image.licenses=BSD-3-Clause
 
-ARG version=13 # Version of GCC to install in this image. Default is 13.
+ARG version=14 # Version of GCC to install in this image. Default is 14.
 
 RUN apt -y update && \
     apt -y install gcc-${version} g++-${version} && \