build-unit-test-docker: Replace lcov with gcovr

Resolves openbmc/openbmc-build-scripts#37

Tested: run-unit-test-docker.sh runs correctly and coverage report
generated by gcovr is present

Change-Id: I60134758477cb8f2f5deb94c26eca515d48199f2
Signed-off-by: Ewelina Walkusz <ewelinax.walkusz@intel.com>
diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index 748dd85..2b391fd 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -159,10 +159,6 @@
         rev="json-c-0.17-20230812",
         build_type="cmake",
     ),
-    "linux-test-project/lcov": PackageDef(
-        rev="v1.16",
-        build_type="make",
-    ),
     "LibVNC/libvncserver": PackageDef(
         rev="LibVNCServer-0.9.14",
         build_type="cmake",
@@ -866,6 +862,7 @@
         black \
         codespell \
         flake8 \
+        gcovr \
         gitlint \
         inflection \
         isort \