GitHub Actions: Fix macOS build issues

Upgrade macOS OpenSSL dependency to use 3 instead of 1.1.

Python's pip from Homebrew now refuses to isntall globally:

error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try brew install
    xyz, where xyz is the package you are trying to
    install.

    If you wish to install a Python library that isn't in Homebrew,
    use a virtual environment:

    python3 -m venv path/to/venv
    source path/to/venv/bin/activate
    python3 -m pip install xyz

    If you wish to install a Python application that isn't in Homebrew,
    it may be easiest to use 'pipx install xyz', which will manage a
    virtual environment for you. You can install pipx with

    brew install pipx

    You may restore the old behavior of pip by passing
    the '--break-system-packages' flag to pip, or by adding
    'break-system-packages = true' to your pip.conf file. The latter
    will permanently disable this error.

    If you disable this error, we STRONGLY recommend that you additionally
    pass the '--user' flag to pip, or set 'user = true' in your pip.conf
    file. Failure to do this can result in a broken Homebrew installation.

    Read more about this behavior here: <https://peps.python.org/pep-0668/>

Using Pipx instead. Making the same change for Ubuntu just in case.

.github/workflows/cmake.yml

@@ -94,13 +94,13 @@ jobs:
       - uses: actions/checkout@v1
 
       - name: Install Build Tools
-        run: brew install bison flex
+        run: brew install bison flex pipx
 
       - name: Install Dependencies
-        run: brew install bzip2 check curl-openssl json-c libxml2 ncurses openssl@1.1 pcre2 zlib
+        run: brew install bzip2 check curl json-c libxml2 ncurses openssl@3 pcre2 zlib
 
       - name: Install pytest for easier to read test results
-        run: python3 -m pip install pytest
+        run: pipx install pytest
 
       - uses: lukka/get-cmake@v3.21.2
 
@@ -119,9 +119,9 @@ jobs:
         # The CMake binaries on the Github Actions machines are (as of this writing) 3.12
         run:
           cmake ${{runner.workspace}}/clamav -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }}
-          -DOPENSSL_ROOT_DIR=/usr/local/opt/openssl@1.1/
-          -DOPENSSL_CRYPTO_LIBRARY=/usr/local/opt/openssl@1.1/lib/libcrypto.1.1.dylib
-          -DOPENSSL_SSL_LIBRARY=/usr/local/opt/openssl@1.1/lib/libssl.1.1.dylib
+          -DOPENSSL_ROOT_DIR=/opt/homebrew/include/
+          -DOPENSSL_CRYPTO_LIBRARY=/opt/homebrew/lib/libcrypto.3.dylib
+          -DOPENSSL_SSL_LIBRARY=/opt/homebrew/lib/libssl.3.dylib
           -DENABLE_STATIC_LIB=ON
           -DENABLE_EXAMPLES=ON
 
@@ -148,13 +148,13 @@ jobs:
         run: sudo apt-get update
 
       - name: Install Build Tools
-        run: sudo apt-get install -y bison flex valgrind
+        run: sudo apt-get install -y bison flex valgrind pipx
 
       - name: Install Dependencies
         run: sudo apt-get install -y check libbz2-dev libcurl4-openssl-dev libjson-c-dev libmilter-dev libncurses5-dev libpcre3-dev libssl-dev libxml2-dev zlib1g-dev
 
       - name: Install pytest for easier to read test results
-        run: python3 -m pip install pytest
+        run: pipx install pytest
 
       - uses: lukka/get-cmake@v3.21.2