Fix Matter codegen test. (#1261)

Code-generated tests have been removed, so there is no longer a "tests" type for
zap_regen_all.py.

.github/workflows/matter.yml

@@ -217,7 +217,6 @@ jobs:
         run: |
           cd chip_repo
           ./scripts/checkout_submodules.py --allow-changing-global-git-config --shallow --platform linux
-          ZAP_INSTALL_PATH=$(pwd)/../zap-release scripts/run_in_build_env.sh "scripts/tools/zap_regen_all.py --type tests"
           ZAP_INSTALL_PATH=$(pwd)/../zap-release scripts/run_in_build_env.sh "scripts/tools/zap_regen_all.py --type global"
           ZAP_INSTALL_PATH=$(pwd)/../zap-release scripts/run_in_build_env.sh "scripts/tools/zap_regen_all.py --type specific"