fix(install): restore cwd after the configure hook

∞zinit-configure-base-hook cd'd into the plugin directory inside a plain
{ } block -- not a subshell -- and every one of its four return paths
left the shell parked there. A `zinit update' on a plugin using the
configure ice moved the user's shell and never moved it back.

Wrap the block in an always clause so the directory is restored on all
paths, and use .zinit-cd-quiet instead of a bare `cd --', which was also
firing chpwd hooks and AUTO_PUSHD.

Signed-off-by: Vladislav Doster <mvdoster@gmail.com>

zinit-install.zsh

@@ -2097,8 +2097,9 @@ zimv() {
     [[ $eflags == $ex ]] || return 0
     typeset -aU configure_opt=(${(@s; ;)configure})
     configure_opt+=("--prefix=${ZPFX:-${ZINIT[HOME_DIR]}/polaris}")
+    local ___oldcd=$PWD ___oldoldpwd=$OLDPWD
     {
-        builtin cd -- "$dir" || return 1
+        .zinit-cd-quiet "$dir" || return 1
         if [[ -n *(#i)makefile(#qN) ]]; then
             return 0
         elif [[ -z *(#i)configure(#qN) ]]; then
@@ -2124,6 +2125,8 @@ zimv() {
             +zi-log "{e} ${ice} Failed project configuration"
             return 1
         fi
+    } always {
+        .zinit-restore-dir "$___oldcd" "$___oldoldpwd"
     }
 } # ]]]
 # FUNCTION: ∞zinit-configure-e-hook [[[