intel/tools: Use 'env bash' to find bash executable

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24453>

src/intel/tools/intel_dump_gpu.in

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # -*- mode: sh -*-
 
 function show_help() {

src/intel/tools/intel_sanitize_gpu.in

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # -*- mode: sh -*-
 
 function show_help() {

src/intel/tools/intel_stub_gpu.in

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # -*- mode: sh -*-
 
 function show_help() {