Also disable winch handling in alacritty

It also reflows.

We might want to think about doing something more extensible here, as
konsole is also about to add reflow, but for now the main problem
children here are VTE and alacritty.

Extends #7491.

CHANGELOG.rst

@@ -209,7 +209,7 @@ Improved terminal support
 -  An issue producing strange status output from commands involving ``not`` has been fixed (:issue:`6566`).
 -  Long command lines are wrapped in all cases, instead of sometimes being put on a new line (:issue:`5118`).
 -  The pager is properly rendered with long command lines selected (:issue:`2557`).
--  Fish no longer performs its own resizing in VTE-based terminals, as they perform their own reflowing, which clashes especially with right prompts (:issue:`7491`).
+-  Fish no longer performs its own resizing in VTE-based terminals and alacritty, as they perform their own reflowing, which clashes especially with right prompts (:issue:`7491`).
 -  Fish now sets terminal modes sooner, which stops output from appearing before the greeting and prompt are ready (:issue:`7489`).
 
 Completions

share/functions/__fish_config_interactive.fish

@@ -247,6 +247,10 @@ function __fish_config_interactive -d "Initializations that should be performed
         if set -q VTE_VERSION
             return
         end
+        # Same for alacritty
+        if string match -q -- 'alacritty*' $TERM
+            return
+        end
         commandline -f repaint >/dev/null 2>/dev/null
     end