Docker-compose disable healthcheck properly handled

Previously, if a container had healthchecks disabled in the
docker-compose.yml file and the user did a `podman inspect <container>`,
they would have an incorrect output:

```
"Healthcheck":{
   "Test":[
      "CMD-SHELL",
      "NONE"
   ],
   "Interval":30000000000,
   "Timeout":30000000000,
   "Retries":3
}
```

After a quick change, the correct output is now the result:
```
"Healthcheck":{
   "Test":[
      "NONE"
   ]
}
```

Closes: containers#14493

Signed-off-by: Jake Correnti <jcorrenti13@gmail.com>

pkg/specgenutil/specgen.go

@@ -873,9 +873,9 @@ func makeHealthCheckFromCli(inCmd, interval string, retries uint, timeout, start
 	}
 
 	var concat string
-	if cmdArr[0] == "CMD" || cmdArr[0] == "none" { // this is for compat, we are already split properly for most compat cases
+	if strings.ToUpper(cmdArr[0]) == "CMD" || strings.ToUpper(cmdArr[0]) == "NONE" { // this is for compat, we are already split properly for most compat cases
 		cmdArr = strings.Fields(inCmd)
-	} else if cmdArr[0] != "CMD-SHELL" { // this is for podman side of things, won't contain the keywords
+	} else if strings.ToUpper(cmdArr[0]) != "CMD-SHELL" { // this is for podman side of things, won't contain the keywords
 		if isArr && len(cmdArr) > 1 { // an array of consecutive commands
 			cmdArr = append([]string{"CMD"}, cmdArr...)
 		} else { // one singular command
@@ -888,7 +888,7 @@ func makeHealthCheckFromCli(inCmd, interval string, retries uint, timeout, start
 		}
 	}
 
-	if cmdArr[0] == "none" { // if specified to remove healtcheck
+	if strings.ToUpper(cmdArr[0]) == "NONE" { // if specified to remove healtcheck
 		cmdArr = []string{"NONE"}
 	}
 

test/compose/disable_healthcheck/docker-compose.yml

@@ -0,0 +1,10 @@
+version: "3.7"
+services:
+  noHc:
+    image: alpine
+    container_name: noHc
+    ports:
+      - "4000:80"
+    restart: unless-stopped
+    healthcheck:
+      disable: true

test/compose/disable_healthcheck/tests.sh

@@ -0,0 +1,2 @@
+podman inspect --format='{{.Config.Healthcheck.Test}}' noHc
+like $output "[NONE]" "$testname: healthcheck properly disabled"