fix bash + python3 shebangs (#33287)

fix shebangs
old-commit-hash: 1dcd660815

scripts/apply-pr.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 if [ $# -eq 0 ]; then
   echo "usage: $0 <pull-request-number>"

scripts/build_small.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -ex
 
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"

scripts/cell.sh

@@ -1,3 +1,3 @@
-#!/usr/bin/bash
+#!/usr/bin/env bash
 nmcli connection modify --temporary esim ipv4.route-metric 1 ipv6.route-metric 1
 nmcli con up esim

scripts/checkout-pr.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 if [ $# -eq 0 ]; then

scripts/launch_corolla.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/bash
+#!/usr/bin/env bash
 
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
 

scripts/lint.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 RED='\033[0;31m'

scripts/retry.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 function fail {
   echo $1 >&2