Move help data from define.auto.c/config.auto.c to a pack.

The help data can be represented more compactly in a pack and this separates data needed for help from data needed for parsing, freeing each to have a more appropriate representation.

test/test.pl

@@ -37,6 +37,7 @@ use pgBackRestBuild::Build;
 use pgBackRestBuild::Build::Common;
 use pgBackRestBuild::Config::Build;
 use pgBackRestBuild::Config::BuildDefine;
+use pgBackRestBuild::Config::BuildHelp;
 use pgBackRestBuild::Config::BuildParse;
 use pgBackRestBuild::Error::Build;
 use pgBackRestBuild::Error::Data;
@@ -573,6 +574,12 @@ eval
                         &BLD_PATH => 'config',
                     },
 
+                    'configHelp' =>
+                    {
+                        &BLD_DATA => buildConfigHelp(),
+                        &BLD_PATH => 'command/help',
+                    },
+
                     'configDefine' =>
                     {
                         &BLD_DATA => buildConfigDefine(),