WIP [CI] Add pipeline for noble (Ubuntu 24.04 LTS)

noble is not yet released at this point

Signed-off-by: Wojtek Porczyk <woju@invisiblethingslab.com>

.ci/linux-sgx-ubuntu24.04-gcc-release.jenkinsfile

@@ -0,0 +1,21 @@
+node('sgx') {
+    checkout scm
+
+    env.SGX = '1'
+    env.SGX_DRIVER = 'upstream'
+
+    load '.ci/lib/config-docker.jenkinsfile'
+    docker.build(
+        "local:${env.BUILD_TAG}",
+        '-f .ci/ubuntu24.04.dockerfile .'
+    ).inside("${env.DOCKER_ARGS_COMMON} ${env.DOCKER_ARGS_SGX}") {
+        load '.ci/lib/config.jenkinsfile'
+        load '.ci/lib/config-release.jenkinsfile'
+
+        load '.ci/lib/stage-lint.jenkinsfile'
+        load '.ci/lib/stage-clean-check-prepare.jenkinsfile'
+        load '.ci/lib/stage-build-sgx.jenkinsfile'
+        load '.ci/lib/stage-test.jenkinsfile'
+        load '.ci/lib/stage-clean-check.jenkinsfile'
+    }
+}

.ci/ubuntu24.04.dockerfile

@@ -0,0 +1,23 @@
+FROM ubuntu:noble
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Intel's RSA-2048 key signing the intel-sgx/sgx_repo repository. Expires 2027-03-20.
+# https://download.01.org/intel-sgx/sgx_repo/ubuntu/intel-sgx-deb.key
+COPY .ci/intel-sgx-deb.key /etc/apt/trusted.gpg.d/intel-sgx-deb.asc
+RUN echo deb [arch=amd64] https://download.01.org/intel-sgx/sgx_repo/ubuntu focal main > /etc/apt/sources.list.d/intel-sgx.list
+
+# Dependencies for actual build.
+# NOTE: COPY invalidates docker cache when source file changes,
+# so `apt-get build-dep` will rerun if dependencies change, despite no change
+# in dockerfile.
+RUN mkdir /debian
+COPY debian/control /debian
+RUN apt-get update && apt-get -y build-dep --no-install-recommends --no-install-suggests /
+RUN rm -rf /debian
+
+# dependencies for various tests, CI-Examples, etc.
+RUN apt-get update && apt-get install -y \
+    nginx
+
+CMD ["bash"]