Use gcovr from ubuntu package

docker/ubuntu_22_04_base

@@ -9,8 +9,8 @@ RUN export DEBIAN_FRONTEND=noninteractive && apt-get update && apt-get upgrade -
     wget git make cmake g++ doxygen \
 # install dependencies
     libboost-all-dev libhdf5-dev libpython3-dev python3-pip \
-    casacore-dev casacore-tools clang-format-12 \
+    casacore-dev casacore-tools clang-format-12 gcovr \
 # The formatter needs a binary named 'clang-format', not 'clang-format-12'.
 # Same for clang-tidy-12.
     && ln -sf clang-format-12 /usr/bin/clang-format \
-    && python3 -m pip install gcovr==5.0 cmake-format
\ No newline at end of file
+    && python3 -m pip install cmake-format
\ No newline at end of file