Build: Change build commands to align with TF-M split build

TF-M build commands are changed by new feature "split build".
Update CI scripts to support this feature.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: If5a81ca7a1bd99ac8fb9f4850be89b48b76fcbe2
diff --git a/lava_helper/codecov_helper.py b/lava_helper/codecov_helper.py
index c4466e2..b56982f 100644
--- a/lava_helper/codecov_helper.py
+++ b/lava_helper/codecov_helper.py
@@ -51,7 +51,7 @@
 
             def dl_artifact(fname):
                 lava.fetch_file(
-                    metadata["build_job_url"] + "artifact/trusted-firmware-m/build/bin/" + fname,
+                    metadata["build_job_url"] + "artifact/ci_build/spe/bin/" + fname,
                     os.path.join(job_dir, fname)
                 )