(MODULES-10897) Fix GPG key typo

Accidentaly removed the RPM part of the filename when getting the GPG
key for SLES in the install task. This commit adds it back and imports
both keys when installing puppet_agent on SLES, for compatibility
reasons.

tasks/install_shell.sh

@@ -513,10 +513,12 @@ info "Downloading Puppet $version for ${platform}..."
 case $platform in
   "SLES")
     info "SLES platform! Lets get you an RPM..."
-    gpg_key="${tmp_dir}/RPM-GPG-KEY-puppet-20250406"
-    do_download "https://yum.puppet.com/GPG-KEY-puppet-20250406" "$gpg_key"
-    rpm --import "$gpg_key"
-    rm -f "$gpg_key"
+    for key in "puppet" "puppet-20250406"; do
+      gpg_key="${tmp_dir}/RPM-GPG-KEY-${key}"
+      do_download "https://yum.puppet.com/RPM-GPG-KEY-${key}" "$gpg_key"
+      rpm --import "$gpg_key"
+      rm -f "$gpg_key"
+    done
     filetype="noarch.rpm"
     filename="${collection}-release-sles-${platform_version}.noarch.rpm"
     download_url="${yum_source}/${filename}"