tests/inst: Add destructive test framework

This adds infrastructure to the Rust test suite for destructive
tests, and adds a new `transactionality` test which runs
rpm-ostree in a loop (along with `ostree-finalize-staged`) and
repeatedly uses either `kill -9`, `reboot` and  `reboot -ff`.

The main goal here is to flush out any "logic errors".

So far I've validated that this passes a lot of cycles
using
```
$ kola run --qemu-image=fastbuild-fedora-coreos-ostree-qemu.qcow2 ext.ostree.destructive-rs.transactionality --debug --multiply 8 --parallel 4
```
a number of times.

tests/kolainst/.gitignore

@@ -0,0 +1 @@
+destructive-list.txt

tests/kolainst/Makefile

@@ -7,9 +7,11 @@ KOLA_TESTDIR = $(DESTDIR)/usr/lib/coreos-assembler/tests/kola/ostree/
 
 all:
 	for x in $(LIBSCRIPTS); do bash -n "$${x}"; done
-	(cd ../inst && cargo build --release)
+	(cd ../inst && cargo run --release -- list-destructive) > destructive-list.txt
 
-install: all
+install:
 	install -D -m 0644 -t $(KOLA_TESTDIR) $(LIBSCRIPTS)
 	for x in $(TESTDIRS); do rsync -rlv ./$${x} $(KOLA_TESTDIR)/; done
 	install -D -m 0755 -t $(KOLA_TESTDIR)/nondestructive-rs ../inst/target/release/ostree-test
+	install -D -m 0644 destructive-stamp.ign $(KOLA_TESTDIR)/destructive-rs/config.ign
+	./install-wrappers.sh destructive-list.txt $(KOLA_TESTDIR)/destructive-rs

tests/kolainst/destructive-stamp.ign

@@ -0,0 +1,17 @@
+{
+  "ignition": {
+    "version": "3.0.0"
+  },
+  "storage": {
+    "files": [
+      {
+        "path": "/etc/ostree-destructive-test-ok",
+        "filesystem": "root",
+        "mode": 420,
+        "contents": {
+          "source": "data:text/plain;base64,"
+        }
+      }
+    ]
+  }
+}

tests/kolainst/install-wrappers.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+set -xeuo pipefail
+# Generates a kola test for each destructive test in the binary
+list=$1
+shift
+testdir=$1
+shift
+ln -Tsf ../nondestructive-rs ${testdir}/data
+while read line; do
+  cat >${testdir}/${line} << EOF
+#!/bin/bash
+set -xeuo pipefail
+dn=\$(dirname $0)
+exec \${KOLA_EXT_DATA}/ostree-test run-destructive ${line}
+EOF
+  chmod a+x "${testdir}/${line}"
+done < "${list}"