codecov_helper.py: Filter out too-verbose lines from genhtml output

The output goes to the job log and it's getting quite large. At the same
time, don't use --quiet flag to genhtml, as per-run coverage stats printed
at the end are useful. So, just filter out lines which are too verbose to
have.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Ia3b309dd55da86721ef96446a071827f959efe69
diff --git a/lava_helper/codecov_helper.py b/lava_helper/codecov_helper.py
index 3ab21de..7d4c452 100644
--- a/lava_helper/codecov_helper.py
+++ b/lava_helper/codecov_helper.py
@@ -56,4 +56,4 @@
             dl_artifact("tfm_ns.axf")
             run("python3 $SHARE_FOLDER/qa-tools/coverage-tool/coverage-reporting/intermediate_layer.py --config-json $SHARE_FOLDER/tf-m-ci-scripts/lava_helper/trace2covjson.json --local-workspace $SHARE_FOLDER", cwd=job_dir)
             run("python3 $SHARE_FOLDER/qa-tools/coverage-tool/coverage-reporting/generate_info_file.py --workspace $SHARE_FOLDER --json covjson.json", cwd=job_dir)
-            run("genhtml --branch-coverage coverage.info --output-directory trace_report", cwd=job_dir)
+            run("genhtml --branch-coverage coverage.info --output-directory trace_report | grep -v -E '^Processing file '", cwd=job_dir)