refactor: get_ostree_data.sh use env shebang - remove from .sanity*

Use the `#!/usr/bin/env bash` shebang which is ansible-test friendly.
This means we can remove get_ostree_data.sh from the .sanity* files.
This also means we can remove the .sanity* files if we do not need
them otherwise.  Fix other shell scripts to use the friendly shebang
and remove from the .sanity* files.

Rename `pth` to `path` in honor of nscott

Signed-off-by: Rich Megginson <rmeggins@redhat.com>

tests/covstats

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # SPDX-License-Identifier: BSD-3-Clause
 
 if [ "$#" -lt 1 ]

tests/get_coverage.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # SPDX-License-Identifier: BSD-3-Clause
 
 if [ -n "${DEBUG}" ]

tests/get_total_coverage.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # SPDX-License-Identifier: BSD-3-Clause
 
 set -e

tests/git-post-commit.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # SPDX-License-Identifier: BSD-3-Clause
 
 set -euo pipefail

tests/git-pre-commit.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # SPDX-License-Identifier: BSD-3-Clause
 
 set -euo pipefail

tests/merge_coverage.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # SPDX-License-Identifier: BSD-3-Clause
 
 if [ -n "${DEBUG}" ]