test: update all calls to image-info

Call the script without a path since it's now in the PATH.

Drop the SELinux labelling workaround (chcon) from filesystem.sh and
image_tests.sh.  The packaged tool is already labelled correctly.

Install osbuild-tools instead of osbuild-composer-tests in
regression-old-worker-new-composer.sh to get osbuild-image-info.

test/cases/api/common/s3.sh

@@ -209,7 +209,7 @@ function verifyDisk() {
     greenprint "Verifying contents of ${filename}"
 
     infofile="${filename}-info.json"
-    sudo /usr/libexec/osbuild-composer-test/image-info "${filename}" | tee "${infofile}" > /dev/null
+    sudo osbuild-image-info "${filename}" | tee "${infofile}" > /dev/null
 
     # save image info to artifacts
     cp -v "${infofile}" "${ARTIFACTS}/image-info.json"