bump Boost to version 1.85.0 for Python 3.11+ and on MacOS

Boost 1.85.0 is the version specified by the VFX reference platform for CY 2025.

CMake supports Boost 1.85 as of version 3.29.3, but Visual Studio 2022 does not
yet offer a release bundling a 3.29.X version of CMake. Using the Boost option
"Boost_ADDITIONAL_VERSIONS=1.85" is needed to support building OpenUSD using
the version of CMake currently bundled with the latest release of Visual Studio
2022.

build_scripts/build_usd.py

@@ -728,7 +728,8 @@ def InstallZlib(context, force, buildArgs):
     "include/boost/version.hpp",
     "include/boost-1_76/boost/version.hpp",
     "include/boost-1_78/boost/version.hpp",
-    "include/boost-1_82/boost/version.hpp"
+    "include/boost-1_82/boost/version.hpp",
+    "include/boost-1_85/boost/version.hpp"
 ]
 
 def InstallBoost_Helper(context, force, buildArgs):
@@ -782,7 +783,7 @@ def InstallBoost_Helper(context, force, buildArgs):
     pyInfo = GetPythonInfo(context)
     pyVer = (int(pyInfo[3].split('.')[0]), int(pyInfo[3].split('.')[1]))
     if MacOS() or (context.buildBoostPython and pyVer >= (3,11)):
-        BOOST_URL = "https://boostorg.jfrog.io/artifactory/main/release/1.82.0/source/boost_1_82_0.zip"
+        BOOST_URL = "https://boostorg.jfrog.io/artifactory/main/release/1.85.0/source/boost_1_85_0.zip"
     elif context.buildBoostPython and pyVer >= (3, 10):
         BOOST_URL = "https://boostorg.jfrog.io/artifactory/main/release/1.78.0/source/boost_1_78_0.zip"
     elif IsVisualStudio2022OrGreater():
@@ -1338,6 +1339,7 @@ def InstallOpenVDB(context, force, buildArgs):
         # system installed boost
         extraArgs.append('-DBoost_NO_BOOST_CMAKE=On')
         extraArgs.append('-DBoost_NO_SYSTEM_PATHS=True')
+        extraArgs.append('-DBoost_ADDITIONAL_VERSIONS=1.85')
 
         extraArgs.append('-DBLOSC_ROOT="{instDir}"'
                          .format(instDir=context.instDir))
@@ -1392,6 +1394,7 @@ def InstallOpenImageIO(context, force, buildArgs):
         # system installed boost
         extraArgs.append('-DBoost_NO_BOOST_CMAKE=On')
         extraArgs.append('-DBoost_NO_SYSTEM_PATHS=True')
+        extraArgs.append('-DBoost_ADDITIONAL_VERSIONS=1.85')
 
         # OpenImageIO 2.3.5 changed the default postfix for debug library
         # names from "" to "_d". USD's build system currently does not support
@@ -1854,6 +1857,7 @@ def InstallUSD(context, force, buildArgs):
         # system installed boost
         extraArgs.append('-DBoost_NO_BOOST_CMAKE=On')
         extraArgs.append('-DBoost_NO_SYSTEM_PATHS=True')
+        extraArgs.append('-DBoost_ADDITIONAL_VERSIONS=1.85')
         extraArgs += buildArgs
 
         RunCMake(context, force, extraArgs)