Resolve OpenSSL configuration issues

[jon-signal]

The main goal here is to resolve a mysterious error some users would see when attempting to use embedded-redis that looks something like this:

Auto configuration failed
139667593160216:error:25FFF06C:DSO support routines:CRYPTO_internal:functionality not supported:dso/dso_lib.c:226:
139667593160216:error:0EFFF06E:configuration file routines:CRYPTO_internal:error loading dso:conf/conf_mod.c:273:module=providers, path=providers
139667593160216:error:0EFFF071:configuration file routines:CRYPTO_internal:unknown module name:conf/conf_mod.c:214:module=providers

The problem is that we were statically linking against libressl, which evidently struggles to parse certain stanzas in some OpenSSL configuration files. There's no mechanism to override the configuration file in play, and so users are stuck trying to comment out the parts of /etc/ssl/openssl.cnf that libressl finds offensive. It's a pretty gnarly situation.

Our solution here is just to link directly against OpenSSL. It's possible that this is just trading one set of problems for another, but it certainly seems to resolve the most common known issue at the moment.

Since we need to generate new binaries anyhow, I took the opportunity to bump us up to Redis 6.2.7 while I was at it.