Add OOM detection for exec driver (#19563)

* Add OomKilled field to executor proto format

* Teach linux executor to detect and report OOMs

* Teach exec driver to propagate OOMKill information

* Fix data race

* use tail /dev/zero to create oom condition

* use new test framework

* minor tweaks to executor test

* add cl entry

* remove type conversion

---------

Co-authored-by: Marvin Chin <marvinchin@users.noreply.github.com>
Co-authored-by: Seth Hoenig <shoenig@duck.com>

ci/slow.go

@@ -43,6 +43,7 @@ var TinyChroot = map[string]string{
 	"/usr/bin/dash":  "/bin/sh",
 	"/usr/bin/bash":  "/bin/bash",
 	"/usr/bin/cat":   "/bin/cat",
+	"/usr/bin/tail":  "/bin/tail",
 
 	// destination: /usr/bin
 	"/usr/bin/stty":   "/usr/bin/stty",