feat!: Remove Paver

BREAKING CHANGE: Removes all remaining Paver commands including
`pavelib/prereqs.py:*` and `pavelib/assets.py:*`.

BREAKING CHANGE: Removes `./manage.py [lms|cms] compile_sass`, which
was just a wrapper around Paver commands.

BREAKING CHANGE: Removes paver.txt. Operators should install testing.txt
instead.

Part of: https://github.com/openedx/edx-platform/issues/34467

scripts/paver_autocomplete.sh

@@ -1,89 +0,0 @@
-# shellcheck disable=all
-# ^ Paver in edx-platform is on the way out
-#   (https://github.com/openedx/edx-platform/issues/31798)
-#   so we're not going to bother fixing these shellcheck
-#   violations.
-
-# Courtesy of Gregory Nicholas
-
-_subcommand_opts()
-{
-    local awkfile command cur usage
-    command=$1
-    cur=${COMP_WORDS[COMP_CWORD]}
-    awkfile=/tmp/paver-option-awkscript-$$.awk
-    echo '
-BEGIN {
-    opts = "";
-}
-
-{
-    for (i = 1; i <= NF; i = i + 1) {
-        # Match short options (-a, -S, -3)
-        # or long options (--long-option, --another_option)
-        # in output from paver help [subcommand]
-        if ($i ~ /^(-[A-Za-z0-9]|--[A-Za-z][A-Za-z0-9_-]*)/) {
-            opt = $i;
-            # remove trailing , and = characters.
-            match(opt, "[,=]");
-            if (RSTART > 0) {
-                opt = substr(opt, 0, RSTART);
-            }
-            opts = opts " " opt;
-        }
-    }
-}
-
-END {
-    print opts
-}' > $awkfile
-
-    usage=`paver help $command`
-    options=`echo "$usage"|awk -f $awkfile`
-
-    COMPREPLY=( $(compgen -W "$options" -- "$cur") )
-}
-
-
-_paver()
-{
-    local cur prev
-    COMPREPLY=()
-    # Variable to hold the current word
-    cur="${COMP_WORDS[COMP_CWORD]}"
-    prev="${COMP_WORDS[COMP_CWORD - 1]}"
-
-    # Build a list of the available tasks from: `paver --help --quiet`
-    local cmds=$(paver -hq | awk '/^  ([a-zA-Z][a-zA-Z0-9_]+)/ {print $1}')
-
-    subcmd="${COMP_WORDS[1]}"
-    # Generate possible matches and store them in the
-    # array variable COMPREPLY
-
-    if [[ -n $subcmd ]]
-    then
-
-        if [[ ${#COMP_WORDS[*]} == 3 ]]
-        then
-                _subcommand_opts $subcmd
-                return 0
-        else
-            if [[ "$cur" == -* ]]
-            then
-                _subcommand_opts $subcmd
-                return 0
-            else
-                COMPREPLY=( $(compgen -o nospace -- "$cur") )
-            fi
-        fi
-    fi
-
-    if [[ ${#COMP_WORDS[*]} == 2 ]]
-    then
-        COMPREPLY=( $(compgen -W "${cmds}" -- "$cur") )
-    fi
-}
-
-# Assign the auto-completion function for our command.
-
-complete -F _paver -o default paver