Utilities/Sphinx: Update qthelp generation to qhelpgenerator

`qcollectiongenerator` is deprecated in favor of `qhelpgenerator`.

Utilities/Release/linux/aarch64/cache.txt

@@ -32,7 +32,7 @@ SPHINX_EXECUTABLE:FILEPATH=/usr/local/bin/sphinx-build
 SPHINX_HTML:BOOL=ON
 SPHINX_MAN:BOOL=ON
 SPHINX_QTHELP:BOOL=ON
-QCOLLECTIONGENERATOR_EXECUTABLE:PATH=/opt/qt/bin/qhelpgenerator
+QHELPGENERATOR_EXECUTABLE:PATH=/opt/qt/bin/qhelpgenerator
 
 # We bootstrap as part of the build so skip its test.
 CMAKE_SKIP_BOOTSTRAP_TEST:STRING=TRUE

Utilities/Release/linux/x86_64/cache.txt

@@ -32,7 +32,7 @@ SPHINX_EXECUTABLE:FILEPATH=/opt/rh/rh-python36/root/usr/bin/sphinx-build
 SPHINX_HTML:BOOL=ON
 SPHINX_MAN:BOOL=ON
 SPHINX_QTHELP:BOOL=ON
-QCOLLECTIONGENERATOR_EXECUTABLE:PATH=/opt/qt/bin/qhelpgenerator
+QHELPGENERATOR_EXECUTABLE:PATH=/opt/qt/bin/qhelpgenerator
 
 # We bootstrap as part of the build so skip its test.
 CMAKE_SKIP_BOOTSTRAP_TEST:STRING=TRUE

Utilities/Release/win/x86/cache-i386.txt

@@ -24,7 +24,7 @@ SPHINX_EXECUTABLE:FILEPATH=C:/python3/Scripts/sphinx-build.exe
 SPHINX_HTML:BOOL=ON
 SPHINX_MAN:BOOL=ON
 SPHINX_QTHELP:BOOL=ON
-QCOLLECTIONGENERATOR_EXECUTABLE:PATH=C:/qt-i386/bin/qhelpgenerator.exe
+QHELPGENERATOR_EXECUTABLE:PATH=C:/qt-i386/bin/qhelpgenerator.exe
 
 # No bootstrap with MSVC tools.
 CMAKE_SKIP_BOOTSTRAP_TEST:STRING=TRUE

Utilities/Release/win/x86/cache-x86_64.txt

@@ -24,7 +24,7 @@ SPHINX_EXECUTABLE:FILEPATH=C:/python3/Scripts/sphinx-build.exe
 SPHINX_HTML:BOOL=ON
 SPHINX_MAN:BOOL=ON
 SPHINX_QTHELP:BOOL=ON
-QCOLLECTIONGENERATOR_EXECUTABLE:PATH=C:/qt-x86_64/bin/qhelpgenerator.exe
+QHELPGENERATOR_EXECUTABLE:PATH=C:/qt-x86_64/bin/qhelpgenerator.exe
 
 # No bootstrap with MSVC tools.
 CMAKE_SKIP_BOOTSTRAP_TEST:STRING=TRUE

Utilities/Sphinx/CMakeLists.txt

@@ -102,12 +102,12 @@ endif()
 if(SPHINX_QTHELP)
   find_package(PythonInterp REQUIRED)
 
-  find_program(QCOLLECTIONGENERATOR_EXECUTABLE
-    NAMES qcollectiongenerator-qt5 qcollectiongenerator
-    DOC "qcollectiongenerator tool"
+  find_program(QHELPGENERATOR_EXECUTABLE
+    NAMES qhelpgenerator-qt5 qhelpgenerator
+    DOC "qhelpgenerator tool"
     )
-  if (NOT QCOLLECTIONGENERATOR_EXECUTABLE)
-    message(FATAL_ERROR "QCOLLECTIONGENERATOR_EXECUTABLE (qcollectiongenerator) not found!")
+  if(NOT QHELPGENERATOR_EXECUTABLE)
+    message(FATAL_ERROR "QHELPGENERATOR_EXECUTABLE (qhelpgenerator) not found!")
   endif()
   list(APPEND doc_formats qthelp)
 
@@ -127,7 +127,7 @@ if(SPHINX_QTHELP)
       "${CMAKE_CURRENT_SOURCE_DIR}/create_identifiers.py"
       "${CMAKE_CURRENT_BINARY_DIR}/qthelp/"
 
-    COMMAND ${QCOLLECTIONGENERATOR_EXECUTABLE}
+    COMMAND ${QHELPGENERATOR_EXECUTABLE}
       ${CMAKE_CURRENT_BINARY_DIR}/qthelp/CMake.qhcp
   )
 endif()