Udpates for 2025 aug 01 part2 (#696)

* Move optional steps for testing VMs out of README.md file
This may help avoid new users being confused that they must follow
those instructions.

Signed-off-by: Andy Fingerhut <andy_fingerhut@alum.wustl.edu>

* Add 2025-Jan-30 versions of source code for install.sh

Signed-off-by: Andy Fingerhut <andy_fingerhut@alum.wustl.edu>

* Additional updates for 2025-Aug-01

Signed-off-by: Andy Fingerhut <andy.fingerhut@gmail.com>

---------

Signed-off-by: Andy Fingerhut <andy_fingerhut@alum.wustl.edu>
Signed-off-by: Andy Fingerhut <andy.fingerhut@gmail.com>

Author: jafingerhut

vm-ubuntu-24.04/install.sh

@@ -27,12 +27,11 @@ print_usage() {
     1>&2 echo ""
     1>&2 echo "Dates supported:"
     1>&2 echo "    2025-Aug-01"
-    1>&2 echo "    2025-Jul-01"
 }
 
 if [ $# -eq 0 ]
 then
-    VERSION="2025-Jul-01"
+    VERSION="2025-Aug-01"
     echo "No version specified.  Defaulting to ${VERSION}"
 elif [ $# -eq 1 ]
 then
@@ -49,12 +48,6 @@ case ${VERSION} in
 	export INSTALL_P4C_SOURCE_VERSION="4d926d0723c42175c960dd72c762b92de70e5b58"
 	export INSTALL_PTF_SOURCE_VERSION="6af750831ffe14512c5195383f2b39691744503e"
 	;;
-    2025-Jul-01)
-	export INSTALL_BEHAVIORAL_MODEL_SOURCE_VERSION="8b6950b9aaff2b89eecd6da63191e1a88be242af"
-	export INSTALL_PI_SOURCE_VERSION="d28b31e4fa05b51f93b9810f5a3ef4a57fbfb8a8"
-	export INSTALL_P4C_SOURCE_VERSION="4a922a2249c7778d72e7247eeb3be4ed7725c0aa"
-	export INSTALL_PTF_SOURCE_VERSION="6af750831ffe14512c5195383f2b39691744503e"
-	;;
     latest)
 	echo "Using the latest version of all p4lang repository source code."
 	;;

vm-ubuntu-24.04/patches/p4runtime-shell-2023-changes.patch

@@ -9,4 +9,4 @@ index 07c5c31..8a9dad9 100644
 -    protobuf >= 3.15.0, < 3.21.0
 +    protobuf >= 3.15.0, < 4.22.0
      grpcio >= 1.35.0
--    p4runtime == 1.3.0
+-    p4runtime == 1.4.1