Don't try to make configuration leaner

Don't try to make configuration leaner

This partially reverts Github PR #16378:
commit 764cf5b26306a8712e8b3d41599c44dc5ed07a25, titled "Configuration:
only produce a new configdata.pm if it has changed contents"

Unfortunately, the attempt to make configuration leaner didn't take
into account all the files that may or may not affect the outcome of
`configdata.pm`, and most of all, didn't take into account that `Makefile`
has clauses of its own to determined when a reconfiguration is needed, all
based on time stamps.

Something as simple as a changed `Configurations/10-main.conf`, where the
change doesn't affect the resulting `configdata.pm` gets `make` into a
reconfiguration loop, because `configdata.pm` is older than `10-main.conf`.

The lesson to remember is not to try to outsmart `make` in cases like this.

We retain the other parts of the PR mentioned, as they are still valid.

needed to be taken into account (all the Configurations/*.conf
as well as all the build.info)

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Todd Short <todd.short@me.com>
(Merged from https://github.com/openssl/openssl/pull/18832)