fix: correct Amazon Linux build stages for the prebuilt dependency

Install full gnupg2 on Amazon Linux 2023:
The AL2023 base image ships gnupg2-minimal, which provides gpg but no
gpg-agent. gpg 2.3 needs the agent even to import a public key, so the
release-artifact verification failed in the Build Docker image step. Pull
full gnupg2 with --allowerasing to replace the minimal variant.

Restore /usr/local lib path in Amazon Linux build stages:
Removing the modern-CMake install block also dropped its PATH and
LD_LIBRARY_PATH env vars, which the stage-1 Python (built --enable-shared
into /usr/local) needs to load libpython at build time. Restore them in the
AL2 and AL2023 build-image stages.

Author: maxday

tests/integration/docker/Dockerfile.echo.amazonlinux2

@@ -67,6 +67,11 @@ RUN yum install -y \
   gnupg2 \
   wget
 
+# The stage-1 Python is built with --enable-shared into /usr/local, so the
+# loader needs /usr/local/lib to run it.
+ENV PATH=/usr/local/bin:$PATH
+ENV LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
+
 
 # Include global args in this stage of the build
 ARG RIC_BUILD_DIR="/home/build/"

tests/integration/docker/Dockerfile.echo.amazonlinux2023

@@ -53,9 +53,7 @@ FROM python-amazonlinux-builder AS build-image
 ARG RUNTIME_VERSION
 ARG ARCHITECTURE
 
-# Install build dependencies (curl built from source; prebuilt aws-lambda-cpp
-# fetched with wget and GPG-verified with gnupg2)
-RUN dnf install -y \
+RUN dnf install -y --allowerasing \
   tar \
   gzip \
   make \
@@ -68,6 +66,11 @@ RUN dnf install -y \
   wget \
   sqlite-devel
 
+# The stage-1 Python is built with --enable-shared into /usr/local, so the
+# loader needs /usr/local/lib to run it.
+ENV PATH=/usr/local/bin:$PATH
+ENV LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
+
 
 # Include global args in this stage of the build
 ARG RIC_BUILD_DIR="/home/build/"