[platform][barefoot] Install sonic_platform to host (#6644)

- Why I did it
SONiC design requires sonic_platform package to be installed in SONiC host environment, not only in docker containers.

- How I did it
For now, sonic_platform python wheel package, that is used by pmon, is provided via device-specific platform modules deb packages that unpacks the wheel package file into specific device's directory on lazy-install.
The PR makes deb packages' postinst script also install these unpacked wheel packages to host.

Signed-off-by: Volodymyr Boyko <volodymyrx.boiko@intel.com>

platform/barefoot/sonic-platform-modules-bfn-montara/debian/postinst

@@ -0,0 +1,10 @@
+#!/bin/sh
+set -e
+
+PLATFORM_NAME=x86_64-accton_wedge100bf_32x-r0
+SONIC_PLATFORM_WHEEL_PY2="/usr/share/sonic/device/${PLATFORM_NAME}/sonic_platform-1.0-py2-none-any.whl"
+python2 -m pip install ${SONIC_PLATFORM_WHEEL_PY2}
+SONIC_PLATFORM_WHEEL_PY3="/usr/share/sonic/device/${PLATFORM_NAME}/sonic_platform-1.0-py3-none-any.whl"
+python3 -m pip install ${SONIC_PLATFORM_WHEEL_PY3}
+
+#DEBHELPER#

platform/barefoot/sonic-platform-modules-bfn-newport/debian/postinst

@@ -1,6 +1,27 @@
 #!/bin/sh
 set -e
-depmod -a 
+depmod -a
 systemctl enable bfn-newport.service
 systemctl start bfn-newport.service
+
+PLATFORM_NAME=x86_64-accton_as9516bf_32d-r0
+SONIC_PLATFORM_WHEEL_PY2="/usr/share/sonic/device/${PLATFORM_NAME}/sonic_platform-1.0-py2-none-any.whl"
+if [ -e ${SONIC_PLATFORM_WHEEL_PY2} ]; then
+    python2 -m pip install ${SONIC_PLATFORM_WHEEL_PY2}
+fi
+SONIC_PLATFORM_WHEEL_PY3="/usr/share/sonic/device/${PLATFORM_NAME}/sonic_platform-1.0-py3-none-any.whl"
+if [ -e ${SONIC_PLATFORM_WHEEL_PY3} ]; then
+    python3 -m pip install ${SONIC_PLATFORM_WHEEL_PY3}
+fi
+
+PLATFORM_NAME=x86_64-accton_as9516_32d-r0
+SONIC_PLATFORM_WHEEL_PY2="/usr/share/sonic/device/${PLATFORM_NAME}/sonic_platform-1.0-py2-none-any.whl"
+if [ -e ${SONIC_PLATFORM_WHEEL_PY2} ]; then
+    python2 -m pip install ${SONIC_PLATFORM_WHEEL_PY2}
+fi
+SONIC_PLATFORM_WHEEL_PY3="/usr/share/sonic/device/${PLATFORM_NAME}/sonic_platform-1.0-py3-none-any.whl"
+if [ -e ${SONIC_PLATFORM_WHEEL_PY3} ]; then
+    python3 -m pip install ${SONIC_PLATFORM_WHEEL_PY3}
+fi
+
 #DEBHELPER#

platform/barefoot/sonic-platform-modules-bfn/debian/postinst

@@ -0,0 +1,10 @@
+#!/bin/sh
+set -e
+
+PLATFORM_NAME=x86_64-accton_wedge100bf_65x-r0
+SONIC_PLATFORM_WHEEL_PY2="/usr/share/sonic/device/${PLATFORM_NAME}/sonic_platform-1.0-py2-none-any.whl"
+python2 -m pip install ${SONIC_PLATFORM_WHEEL_PY2}
+SONIC_PLATFORM_WHEEL_PY3="/usr/share/sonic/device/${PLATFORM_NAME}/sonic_platform-1.0-py3-none-any.whl"
+python3 -m pip install ${SONIC_PLATFORM_WHEEL_PY3}
+
+#DEBHELPER#