[github-acction] build jobs failure due to deprecated macOS-12 enviro…

…nment

The macOS-12 environment is deprecated, consider switching to macOS-13, macOS-14 (macos-latest) or macOS-15.

For more details, see actions/runner-images#10721

In addition, removing -s option because the -s option is not supported by the realpath command in macOS 13 (Ventura) and later versions

tests/integration/common.sh

@@ -29,7 +29,7 @@
 
 ## This file defines constants and common functions for test cases.
 
-readonly CUR_DIR=$(dirname "$(realpath -s $0)")
+readonly CUR_DIR=$(dirname "$(realpath $0)")
 readonly TEST_ROOT_DIR=${CUR_DIR}
 
 readonly RUNTIME_DIR=/tmp/test-ot-commissioner