fix: fcitx5 can not start

we must exclude input method related environment variable
or it will cause im launch script launch error

Log:

misc/Xsession.d/00deepin-dde-env

@@ -4,10 +4,13 @@
 
 # export systemd environment to avoid environment be replaced by dde-session
 # fix https://github.com/linuxdeepin/developer-center/issues/6225
+# the following environment variables need to be excluded, otherwise it will affect the startup of some applications
+EXCLUDED_ENV="XDG_VTNR\|XDG_SESSION_ID\|XDG_SEAT\|XDG_SESSION_TYPE\|XMODIFIERS\|GTK_IM_MODULE\|QT_IM_MODULE\|CLUTTER_IM_MODULE\|SDL_IM_MODULE"
+
 eval "$(
 	busctl --json=short --user get-property org.freedesktop.systemd1 /org/freedesktop/systemd1 org.freedesktop.systemd1.Manager Environment |
 		jq .data\[\] --raw-output |
-		grep -v "XDG_VTNR\|XDG_SESSION_ID\|XDG_SEAT\|XDG_SESSION_TYPE" | # handle special character in environment
+		grep -v "$EXCLUDED_ENV" | # handle special character in environment
 		sed -r 's/\\/\\\\/' |
 		sed -r 's/'\''/\\'\''/' |
 		sed -r 's/"/\\"/' |