Make configdata.pm runnable and move all display of information there

Make configdata.pm runnable and move all display of information there

The "make variable" information displayed by Configure was selective
and incomplete, and possibly undesirable (too verbose).

Instead, we make configdata.pm and have the user run it to get the
information they desire, and also make it possible to have it perform
a reconfiguration.

Possibilities so far:

perl configdata.pm --dump               Displays everything (i.e. the
                                        combined output from
                                        --command-line, --environment,
                                        --make-variables and
                                        --build-parameters.
perl configdata.pm --command-line       Displays the config command
                                        line.
perl configdata.pm --envirnoment        Displays the recorded
                                        environment variables.
perl configdata.pm --make-variables     Displays the configured "make
                                        variables".
perl configdata.pm --build-parameters   Displays the build file and
                                        the template files to create
                                        it.
perl configdata.pm --reconfigure        Re-runs the configuration with
                                        the recorded environment
                                        variables.

--verbose can be used to have --reconfigure be a bit more verbose.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5185)