Split test/test_erlang test project and make it faster

The test/test_erlang test project is used to test the compilation of various Erlang-only dependencies.

name = "project"
version = "0.1.0"

[dependencies]
# These are Gleam deps
gleam_stdlib = "~> 0.18"
gleam_erlang = "~> 0.5"

# This is a rebar3 dep that uses files in ./priv
certifi = "~> 2.8"
# This is a rebar3 dep that uses files in ./ebin
cowboy = "~> 2.9"
# This is a mix dep that uses files in ./priv
countries = "~> 1.6"

# This is both a mix and a rebar3 dep!
# We want to default to using rebar3 as that is the build tool that is more
# likely to be installed.
ssl_verify_fun = "~> 1.1"

# This is a rebar3 dep that calls make to compile C into a .so file that is
# loaded at runtime from ./priv
# TODO: replace this with a package with a nif that compiles super fast. Perhaps
# just a hello world.
bcrypt = "~> 1.1"
# This is a rebar3 dep that output files in $REBAR_BARE_COMPILER_OUTPUT_DIR/priv
# and requires absolute paths
ezstd = "~> 1.1"

# This is a rebar3 dep where the application name (hpack, used by the BEAM)
# doesn't match the package name (hpack_erl, used by Hex).
hpack_erl = "~> 0.1"
gleam_javascript = "~> 0.7"

[dev_dependencies]
gleeunit = "~> 1.0"

Split this into multiple tests so each one only tests one compilation edge-case, and replace the expensive slow compiling dependencies with new ones that have the same properties but have minimal amounts of code, making them very fast to compile.

Part of https://github.com/gleam-lang/gleam/issues/5726