Copy Qt pdb files to the build folder when present

Qt is distributed both with and without pdb files. When they are present,
copy them next to the Qt dlls so symbols are available when debugging.

Pass --pdb to windeployqt for the configurations built with debug
information, and copy the matching pdb file in the AppFwk test
applications and unit tests using a helper script that skips missing
files.

ApplicationExeCode/CMakeLists.txt

@@ -396,7 +396,8 @@ if(RESINSIGHT_PRIVATE_INSTALL)
       POST_BUILD
       COMMAND
         ${WINDEPLOYQT_EXECUTABLE} $<TARGET_FILE:ResInsight>
-        "$<IF:$<CONFIG:Debug>,--debug,--release>" --no-translations >NUL 2>NUL
+        "$<IF:$<CONFIG:Debug>,--debug,--release>"
+        "$<$<CONFIG:Debug,RelWithDebInfo>:--pdb>" --no-translations >NUL 2>NUL
       COMMENT
         "Running windeployqt to deploy Qt dependencies to the build folder, required by install()"
     )