Remove openssl

[mamcx]

Description of Changes

Using the openssl crate significantly increases the build times on Windows. Switching to rustls improves it:

# Windows 11
# 1.79.0-x86_64-pc-windows-msvc 
# AMD Ryzen 9 7940HS w/ Radeon 780M Graphics        4.00 GHz
#  32.0 GB (25.8 GB usable)

   Compiling spacetimedb-core v0.12.0 (C:\Proyectos\space\SpacetimeDB\crates\core)
   Compiling spacetimedb-client-api v0.12.0 (C:\Proyectos\space\SpacetimeDB\crates\client-api)
   Compiling spacetimedb-standalone v0.12.0 (C:\Proyectos\space\SpacetimeDB\crates\standalone)   

OpenSSL:

    Finished `dev` profile [unoptimized + debuginfo] target(s) in 4m 01s
    Finished `release` profile [optimized] target(s) in 4m 39s    

RusTls:

    Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 21s
    Finished `release` profile [optimized] target(s) in 2m 02s    

Expected complexity level and risk

*How complicated do you think these changes are? Grade on a scale from 1 to 5,

3

It looks correct to me the generation and reading of keys. However, even if trivial, changing libraries that do crypto requires careful eyes.

Testing

• * Check using https://8gwifi.org/PemParserFunctions.jsp that we use the same algorithms and settings as from openssl.*
• Publish quickstart and re-read the keys
• Manual inspection of the keys and config files

[gefjon]

I strongly request that we not do potentially dangerous changes which are not intended to be API breaks within the 0.12 release window. This can, and therefore should, wait.

[mamcx]

Changed to draft so we don't merge yet

[mamcx]

Btw, this adds cmake as a requirement on Windows.

[RReverser]

Btw, this adds [cmake](https://aws.github.io/aws-lc-rs/requirements/windows0 as a requirement on Windows.

Sigh. It's somewhat unfortunate to replace one external dependency for Windows devs (Perl or prebuilt OpenSSL) with another (CMake).

[mamcx]

Is now good time to change this from Draft?