Quadlet - explicit support for read-only-tmpfs

Add Quadlet key and disconnect relationship withr read-only
Update and add tests
Update man with new key

Remove the reference to VolatileTmpfs in the man page to reduce its
usage, since the same functionality can be achieved using the Tmpfs key
while keeping its support to maintain backward compatibility

Signed-off-by: Ygal Blum <ygal.blum@gmail.com>

test/e2e/quadlet/readonly-notmpfs.container

@@ -4,4 +4,4 @@
 [Container]
 Image=localhost/imagename
 ReadOnly=yes
-VolatileTmp=no
+ReadOnlyTmpfs=no

test/e2e/quadlet/readonly-tmpfs.container

@@ -0,0 +1,7 @@
+## assert-podman-args "--read-only-tmpfs"
+## assert-podman-args "--read-only"
+
+[Container]
+Image=localhost/imagename
+ReadOnly=yes
+ReadOnlyTmpfs=yes

test/e2e/quadlet/readonly.container

@@ -0,0 +1,6 @@
+## !assert-podman-args "--read-only-tmpfs"
+## assert-podman-args "--read-only"
+
+[Container]
+Image=localhost/imagename
+ReadOnly=yes

test/e2e/quadlet/volatiletmp-readonly.container

@@ -0,0 +1,6 @@
+## !assert-podman-args "--tmpfs" "/tmp:rw,size=512M,mode=1777"
+
+[Container]
+Image=localhost/imagename
+VolatileTmp=yes
+ReadOnly=yes

test/e2e/quadlet/volatiletmp-readwrite.container

@@ -1,8 +1,5 @@
-## !assert-podman-args "--read-only"
-## assert-podman-args "--read-only=false"
 ## assert-podman-args "--tmpfs" "/tmp:rw,size=512M,mode=1777"
 
 [Container]
 Image=localhost/imagename
 VolatileTmp=yes
-ReadOnly=no

test/e2e/quadlet_test.go

@@ -709,9 +709,12 @@ BOGUS=foo
 		Entry("ports.container", "ports.container", 0, ""),
 		Entry("ports_ipv6.container", "ports_ipv6.container", 0, ""),
 		Entry("pull.container", "pull.container", 0, ""),
+		Entry("readonly.container", "readonly.container", 0, ""),
+		Entry("readonly-tmpfs.container", "readonly-tmpfs.container", 0, ""),
 		Entry("readonly-notmpfs.container", "readonly-notmpfs.container", 0, ""),
 		Entry("readwrite-notmpfs.container", "readwrite-notmpfs.container", 0, ""),
-		Entry("readwrite.container", "readwrite.container", 0, ""),
+		Entry("volatiletmp-readwrite.container", "volatiletmp-readwrite.container", 0, ""),
+		Entry("volatiletmp-readonly.container", "volatiletmp-readonly.container", 0, ""),
 		Entry("remap-auto.container", "remap-auto.container", 0, ""),
 		Entry("remap-auto2.container", "remap-auto2.container", 0, ""),
 		Entry("remap-keep-id.container", "remap-keep-id.container", 0, ""),