IDEA-CR-48413: GO-7539 fix env vars override

Don't use a pipe: bash unlike zhsh creates a subshell for the loop and
exported variables are gone after loop is
over (http://mywiki.wooledge.org/BashFAQ/024).

(cherry picked from commit c31048277888dbea1cf4a770820ded76e9bea176)

GitOrigin-RevId: 97f0ccce4f536c441b8c8e249d5bc051cfae8016

plugins/terminal/resources/jediterm-bash.in

@@ -32,7 +32,7 @@ else
 fi
 
 function override_jb_variables {
-  env | while IFS="=" read NAME VALUE
+  while IFS="=" read NAME VALUE
   do
     if [[ $NAME = '_INTELLIJ_FORCE_SET_'* ]]
     then
@@ -42,7 +42,7 @@ function override_jb_variables {
         export "$NEW_NAME"="$VALUE"
       fi
     fi
-  done
+  done < <(env)
 }
 
 override_jb_variables