[master] rebuild resigning heaps when loading map files

3597.	[bug]		Ensure automatic-resigning heaps are reconstructed
			when loading zones in map format. [RT #33381]

bin/tests/system/masterformat/ns1/named.conf

@@ -30,6 +30,15 @@ options {
 	dnssec-enable yes;
 };
 
+key rndc_key {
+        secret "1234abcd8765";
+        algorithm hmac-sha256;
+};
+
+controls {
+        inet 10.53.0.1 port 9953 allow { any; } keys { rndc_key; };
+};
+
 zone "example" {
 	type master;
 	masterfile-format raw;
@@ -66,3 +75,12 @@ zone "large" {
 	masterfile-format raw;
         allow-transfer { any; };
 };
+
+zone "signed" {
+        type master;
+        file "signed.db.map";
+        masterfile-format map;
+        allow-transfer { any; };
+        update-policy local;
+        auto-dnssec maintain;
+};