CI: remove no longer needed shippable scripts; modernize and harmonize AZP scripts (#1286)

* Remove no longer needed shippable scripts.

* Modernize and harmonize AZP scripts.

.azure-pipelines/scripts/report-coverage.sh

@@ -1,18 +1,14 @@
 #!/usr/bin/env bash
-# Generate code coverage reports for uploading to Azure Pipelines and codecov.io.
-
 # Copyright (c) Ansible Project
 # GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
 # SPDX-License-Identifier: GPL-3.0-or-later
 
+# Generate code coverage reports for uploading to Azure Pipelines and codecov.io.
+
 set -o pipefail -eu
 
 PATH="${PWD}/bin:${PATH}"
 
-if [[ "$(ansible --version)" =~ \ 2\.9\. ]]; then
-    exit
-fi
-
 if ! ansible-test --help >/dev/null 2>&1; then
     # Install the devel version of ansible-test for generating code coverage reports.
     # This is only used by Ansible Collections, which are typically tested against multiple Ansible versions (in separate jobs).