Update bin/fetch-configlet script

[kytrinyx]

The script has been tweaked to work better across all platforms.

Ref exercism/exercism#6591

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[ee7]

Note that this PR added a new script, rather than editing the existing bin/fetch_configlet.sh (which has an underscore, and a file extension).

I created #1218, but we could also do the opposite thing.

I think we can either:

• Allow tracks to name the script whatever they want (perhaps for some internally consistent script-naming style) and when mass-updating fetch-configlet scripts, ensure that we detect the repo-specific filename.
• Force every repo to use the same filename for the fetch-configlet script.

I don't mind, as long as we don't have multiple scripts in the same repo.

[ee7]

@kytrinyx I think the Elixir track is the main such case, but please double-check.

$ paths="$(rg --sort path --files-with-matches 'https://api.github.com/repos/exercism/configlet/releases/latest')"
$ echo "${paths}"
05ab1e/bin/fetch-configlet
abap/bin/fetch-configlet
abap/bin/fetch-configlet.ps1
ada/bin/fetch-configlet
arm64-assembly/bin/fetch-configlet
awk/bin/fetch-configlet
awk/bin/fetch-configlet.ps1
babashka/bin/fetch-configlet
ballerina/bin/fetch-configlet
bash/bin/fetch-configlet
bqn/bin/fetch-configlet
bqn/bin/fetch-configlet.ps1
c/bin/fetch-configlet
ceylon/bin/fetch-configlet
cfml/bin/fetch-configlet
chapel/bin/fetch-configlet
chapel/bin/fetch-configlet.ps1
clojure/bin/fetch-configlet
clojurescript/bin/fetch-configlet
cobol/bin/fetch-configlet
cobol/bin/fetch-configlet.ps1
coffeescript/bin/fetch-configlet
common-lisp/bin/fetch-configlet
coq/bin/fetch-configlet
cpp/bin/fetch-configlet
cpp/bin/fetch-configlet.ps1
crystal/bin/fetch-configlet
d/bin/fetch-configlet
dart/bin/fetch-configlet
dart/bin/fetch-configlet.ps1
delphi/bin/fetch-configlet
elixir/bin/fetch_configlet.sh
elm/bin/fetch-configlet
emacs-lisp/bin/fetch-configlet
erlang/bin/fetch-configlet
factor/bin/fetch-configlet
forth/bin/fetch-configlet
fortran/bin/fetch-configlet
fortran/bin/fetch_configlet.py
free-pascal/bin/fetch-configlet
free-pascal/bin/fetch-configlet.ps1
gleam/bin/fetch-configlet
gnu-apl/bin/fetch-configlet
gnucobol/bin/fetch-configlet
gnucobol/bin/fetch-configlet.ps1
go/bin/fetch-configlet
haskell/bin/fetch-configlet
haxe/bin/fetch-configlet
idris/bin/fetch-configlet
io/bin/fetch-configlet
j/bin/fetch-configlet
java/bin/fetch-configlet
javascript/bin/fetch-configlet
javascript/bin/fetch-configlet.ps1
jq/bin/fetch-configlet
jq/bin/fetch-configlet.ps1
julia/bin/fetch-configlet
kotlin/bin/fetch-configlet
lfe/bin/fetch-configlet
lua/bin/fetch-configlet
mips/bin/fetch-configlet
nim/bin/fetch-configlet
nix/bin/fetch-configlet
objective-c/bin/fetch-configlet
ocaml/bin/fetch-configlet
openeuphoria/bin/fetch-configlet
openeuphoria/bin/fetch-configlet.ps1
perl5/bin/fetch-configlet
pharo-smalltalk/bin/fetch-configlet
php/bin/fetch-configlet
plsql/bin/fetch-configlet
pony/bin/fetch-configlet
powershell/bin/fetch-configlet
prolog/bin/fetch-configlet
purescript/bin/fetch-configlet
python/bin/fetch-configlet
qsharp/bin/fetch-configlet
qsharp/bin/fetch-configlet.ps1
r/bin/fetch-configlet
racket/bin/fetch-configlet
raku/bin/fetch-configlet
reasonml/bin/fetch-configlet
red/bin/fetch-configlet
red/bin/fetch-configlet.ps1
ruby/bin/fetch-configlet
rust/bin/fetch-configlet
rust/util/exercise/src/cmd/fetch_configlet.rs
scala/bin/fetch-configlet
scheme/bin/fetch-configlet
shen/bin/fetch-configlet
sml/bin/fetch-configlet
solidity/bin/fetch-configlet
solidity/bin/fetch-configlet.ps1
swift/bin/fetch-configlet
system-verilog/bin/fetch-configlet
tcl/bin/fetch-configlet
typescript/bin/fetch-configlet
typescript/bin/fetch-configlet.ps1
unison/bin/fetch-configlet
unison/bin/fetch-configlet.ps1
vimscript/bin/fetch-configlet
vlang/bin/fetch-configlet
vlang/bin/fetch-configlet.ps1
wasm/bin/fetch-configlet
wasm/bin/fetch-configlet.ps1
wren/bin/fetch-configlet
wren/bin/fetch-configlet.ps1
x86-64-assembly/bin/fetch-configlet
z3/bin/fetch-configlet
z3/bin/fetch-configlet.ps1
zig/bin/fetch-configlet
zig/bin/fetch-configlet.ps1
$ echo "${paths}" | grep -v '.*bin/fetch-configlet[\.ps1]*$'
elixir/bin/fetch_configlet.sh
fortran/bin/fetch_configlet.py
rust/util/exercise/src/cmd/fetch_configlet.rs

[jiegillet]

I didn't notice the name was different, my bad.
I'm not sure why we had a different name, but personally, I'm in favor of forcing all tracks to have the same name, it's just easier to centralize these things.