main,monitor: fix total steps in progress reporting

The existing code to record progress was a bit too naive. Instead
of just counting the number os pipelines in a manifest to get the
total steps we need to look at the resolved pipelines.

with this fix `bib` will report the correct number of steps left
when doing e.g. a qcow2 image build. Right now the number of
steps is incorrect because the osbuild manifest contains pipelines
for qcow2,vdmk,raw,ami and all are currently considered steps
that need to be completed. With this commit this is fixed.

test/mod/test_monitor.py

@@ -199,7 +199,7 @@ def test_json_progress_monitor():
     manifest.add_pipeline(pl2, "", "")
 
     with tempfile.TemporaryFile() as tf:
-        mon = JSONSeqMonitor(tf.fileno(), manifest)
+        mon = JSONSeqMonitor(tf.fileno(), len(manifest.sources) + len(manifest.pipelines))
         mon.log("test-message-1")
         mon.log("test-message-2", origin="test.origin.override")
         mon.begin(manifest.pipelines["test-pipeline-first"])