Add UBI 8 image to the dependencies report (elastic#21374)

Red Hat certification process requires to include the UBI image in the
list of dependencies for the project.
Append it to the current list of dependencies.
This requires to include a new sourceURL column in the CSV, because
UBI images have a different url and source url. This is kept the same
for existing dependencies.

(cherry picked from commit e6c3d89)

dev-tools/dependencies-report

@@ -41,3 +41,14 @@ go list -m -json all $@ | go run go.elastic.co/go-licence-detector \
 		-noticeTemplate "$SRCPATH/notice/dependencies.csv.tmpl" \
 		-noticeOut "$outfile" \
 		-depsOut ""
+
+
+# Fill-in required values for UBI images
+# Check headers in $SRCPATH/notice/dependencies.csv.tmpl:
+# name,url,version,revision,license
+ubi8url='https://catalog.redhat.com/software/containers/ubi8/ubi-minimal/5c359a62bed8bd75a2c3fba8'
+ubi8source='https://oss-dependencies.elastic.co/redhat/ubi/ubi-minimal-8-source.tar.gz'
+ubilicense='Custom;https://www.redhat.com/licenses/EULA_Red_Hat_Universal_Base_Image_English_20190422.pdf,https://oss-dependencies.elastic.co/redhat/ubi/ubi-minimal-8-source.tar.gz'
+cat <<EOF >> $outfile
+Red Hat Universal Base Image,$ubi8url,8,,$ubilicense,$ubi8source
+EOF

dev-tools/notice/dependencies.csv.tmpl

@@ -1,7 +1,7 @@
 {{- define "depInfo" -}}
 {{- range $i, $dep := . }}
-{{ $dep.Name }},{{ $dep.URL }},{{ $dep.Version | canonicalVersion }},{{ $dep.Version | revision }},{{ $dep.LicenceType }}
+{{ $dep.Name }},{{ $dep.URL }},{{ $dep.Version | canonicalVersion }},{{ $dep.Version | revision }},{{ $dep.LicenceType }},{{ $dep.URL }}
 {{- end -}}
 {{- end -}}
 
-name,url,version,revision,license{{ template "depInfo" .Direct }}{{ template "depInfo" .Indirect }}
+name,url,version,revision,license,sourceURL{{ template "depInfo" .Direct }}{{ template "depInfo" .Indirect }}