tests: Add gating test

Do a basic test on pbzip2 for gating.

Resolves: RHEL-53370

.fmf/version

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+1

gating.yaml

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+--- !Policy
+product_versions:
+  - rhel-10
+decision_context: osci_compose_gate
+rules:
+  - !PassingTestCaseRule {test_case_name: osci.brew-build.tier0.functional}

plans/build-iso.fmf

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+summary: Run pbzip2 tests
+execute:
+    script: ./tests/scripts/run_tests.sh

tests/scripts/run_tests.sh

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+#!/bin/bash
+set -eux
+
+# Test basic pbzip2 operations
+
+# Just some text we know is present
+cat /usr/share/doc/pbzip2/* > test-file.txt
+sha256sum test-file.txt > test-file.txt.sha256
+
+# Compress a stream from stdin
+pbzip2 -p4 < test-file.txt > test-stream.bz2
+[ -e test-stream.bz2 ] || exit 1
+
+# Uncompress and check it
+pbzip2 -p4 -dc < test-stream.bz2 > test-file.txt
+sha256sum -c test-file.txt.sha256
+
+# Compress a file (removes original)
+pbzip2 -p4 test-file.txt
+[ -e test-file.txt.bz2 ] || exit 1
+
+# Uncompress and check it
+pbzip2 -p4 -df test-file.txt.bz2
+sha256sum -c test-file.txt.sha256
+
+echo "PASS"
+exit 0