Improve gen_tile_test test coverage (#382)

* Don't limit Coverage CTest parallel level to 1
* Additional tests
* Re-enable Fedora Rawhide

Author: hummeltech

.github/workflows/build-and-test.yml

@@ -20,7 +20,7 @@ jobs:
           - "debian:testing"
           - "fedora:38"
           - "fedora:39"
-          # - "fedora:rawhide"
+          - "fedora:rawhide"
           - "opensuse/leap:15"
           - "quay.io/centos/centos:stream8"
           - "quay.io/centos/centos:stream9"

.github/workflows/coverage.yml

@@ -19,7 +19,6 @@ jobs:
       BUILD_TYPE: Debug
       CFLAGS: --coverage
       CXXFLAGS: --coverage
-      TEST_PARALLEL_LEVEL: 1
     strategy:
       matrix:
         compiler: