ci: remove an unneeded cmake install step

The `static_build_cmake_linux` workflow installs CMake 3.17, because it
needs ctest's `--repeat until-pass:3` option. However, now CMake 3.26 is
installed by a previous step (via `install-deps-debian`).

The original motivation behind the removed step was to upgrade CMake,
but now the step downgrades it. It has a little sense.

For ones who worry if we verify the build with an older CMake version:
we have CMake 3.18 in the CentOS 7 job in the `distrib` workflow, and
3.18 will be the new minimal supported version soon (see the linked
issue).

Part of tarantool#13306

NO_DOC=ci
NO_CHANGELOG=ci
NO_TEST=ci

Author: Totktonada

.github/workflows/static_build_cmake_linux.yml

@@ -89,13 +89,6 @@ jobs:
         with:
           submodule: ${{ inputs.submodule }}
           revision: ${{ inputs.revision }}
-      # Install CMake using PyPI, because option
-      # `--repeat until-pass:3` required by CTest was added since
-      # CMake 3.17.
-      - name: install cmake
-        run: |
-          apt -y remove cmake
-          pip3 install cmake==3.17.3
       - name: test
         run: make -f .test.mk test-static-cmake
       - name: Send VK Teams message on failure