test: Install test journals

Let's package these just like we package other test data.

test/units/testsuite-04.corrupted-journals.sh

@@ -6,11 +6,11 @@ set -o pipefail
 JOURNAL_DIR="$(mktemp -d)"
 REMOTE_OUT="$(mktemp -d)"
 # tar on C8S doesn't support the --zstd option
-unzstd --stdout "/test-journals/afl-corrupted-journals.tar.zst" | tar -xC "$JOURNAL_DIR/"
+unzstd --stdout "/usr/lib/systemd/tests/testdata/test-journals/afl-corrupted-journals.tar.zst" | tar -xC "$JOURNAL_DIR/"
 while read -r file; do
     filename="${file##*/}"
     unzstd "$file" -o "$JOURNAL_DIR/${filename%*.zst}"
-done < <(find /test-journals/corrupted/ -name "*.zst")
+done < <(find /usr/lib/systemd/tests/testdata/test-journals/corrupted/ -name "*.zst")
 # First, try each of them sequentially. Skip this part when running with plain
 # QEMU, as it is excruciatingly slow
 # Note: we care only about exit code 124 (timeout) and special bash exit codes

test/units/testsuite-04.journal.sh

@@ -244,7 +244,7 @@ JOURNAL_DIR="$(mktemp -d)"
 while read -r file; do
     filename="${file##*/}"
     unzstd "$file" -o "$JOURNAL_DIR/${filename%*.zst}"
-done < <(find /test-journals/no-rtc -name "*.zst")
+done < <(find /usr/lib/systemd/tests/testdata/test-journals/no-rtc -name "*.zst")
 
 journalctl --directory="$JOURNAL_DIR" --list-boots --output=json >/tmp/lb1
 diff -u /tmp/lb1 - <<'EOF'