The SHA256 checksums for Rust 1.88.0 were incorrect, causing checksum
verification failures during installation. Updated with the correct
official checksums from https://static.rust-lang.org/dist/:
- x86_64-unknown-linux-gnu:
7b5437c1d18a174faae253a18eac22c32288dccfc09ff78d5ee99b7467e21bca
- x86_64-unknown-linux-musl:
200bcf3b5d574caededba78c9ea9d27e7afc5c6df4154ed0551879859be328e1
- aarch64-unknown-linux-gnu:
d5decc46123eb888f809f2ee3b118d13586a37ffad38afaefe56aa7139481d34
- aarch64-unknown-linux-musl:
f8b3a158f9e5e8cc82e4d92500dd2738ac7d8b5e66e0f18330408856235dec35
This PR introduces the installation of the `musl`-based version of Rust,
in order to support alpine-based runtime environments (Rust is used by
[RedisJSON](https://github.com/RedisJSON/RedisJSON)).
A new BUILD_WITH_MODULES flag was added to the Makefile to control
building the module directory.
The new module directory includes a general Makefile that iterates
over each module, fetch a specific version, and build it.
Co-authored-by: YaacovHazan <yaacov.hazan@redislabs.com>
