Travis: switch to Mbed CLI 2

As Mbed CLI 2 + CMake is supported now, this PR switches Travis to
test Mbed CLI 2 only. This aligns with all Mbed official examples.

Author: LDong-Arm

.travis.yml

@@ -20,6 +20,9 @@ dist: focal
 
 addons:
   apt:
+    sources:
+      - sourceline: 'deb https://apt.kitware.com/ubuntu/ focal main'
+        key_url: 'https://apt.kitware.com/keys/kitware-archive-latest.asc'
     packages:
       - cmake
       - srecord
@@ -49,11 +52,19 @@ matrix:
       install:
         # Install arm-none-eabi-gcc
         - pushd /home/travis/build && mkdir arm-gcc && cd arm-gcc
-        - curl -L0 "https://developer.arm.com/-/media/Files/downloads/gnu-rm/9-2019q4/gcc-arm-none-eabi-9-2019-q4-major-x86_64-linux.tar.bz2?revision=108bd959-44bd-4619-9c19-26187abf5225&la=en&hash=E788CE92E5DFD64B2A8C246BBA91A249CB8E2D2D" --output gcc-arm-none-eabi-9-2019-q4-major.tar.bz2
+        - curl -L0 "https://developer.arm.com/-/media/Files/downloads/gnu-rm/9-2019q4/gcc-arm-none-eabi-9-2019-q4-major-x86_64-linux.tar.bz2" --output gcc-arm-none-eabi-9-2019-q4-major.tar.bz2
         - tar xf gcc-arm-none-eabi-9-2019-q4-major.tar.bz2
         - export PATH="$PATH:${PWD}/gcc-arm-none-eabi-9-2019-q4-major/bin"
         - arm-none-eabi-gcc --version
         - popd
+        # Hide Travis-preinstalled CMake
+        # The Travis-preinstalled CMake is unfortunately not installed via apt, so we
+        # can't replace it with an apt-supplied version very easily. Additionally, we
+        # can't permit the Travis-preinstalled copy to survive, as the Travis default
+        # path lists the Travis CMake install location ahead of any place where apt
+        # would install CMake to. Instead of apt removing or upgrading to a new CMake
+        # version, we must instead delete the Travis copy of CMake.
+        - sudo rm -rf /usr/local/cmake*
         # Setup ccache
         - ccache -o compiler_check=content
         - ccache -M 1G
@@ -64,11 +75,11 @@ matrix:
         # Fetch mbed-os: We use manual clone, with depth=1 and --single-branch to save time.
         - git clone --depth=1 --single-branch https://github.com/ARMmbed/mbed-os.git
         # Install Mbed CLI and dependencies
-        - pip install --upgrade mbed-cli
+        - pip install --upgrade mbed-tools
         - pip install -r mbed-os/requirements.txt
       script:
         # Build TF-M and all tests
-        - python3 test_psa_target.py -t GNUARM -m ${TARGET_NAME} -b
+        - python3 test_psa_target.py -t GNUARM -m ${TARGET_NAME} --cli=2 -b
         - ccache -s
 
     # ARM_MUSCA_B1