fix(manager/terragrunt): add missing registry host

Added registry url to extraction result at Terragrunt Manager when
source uses tfr protocol and contains custom registry hostname.

Fixes: #26668

lib/modules/manager/terragrunt/__fixtures__/1.hcl

@@ -37,3 +37,8 @@ terraform {
 terraform {
   source = "tfr://terraform-aws-modules/vpc/aws?version=3.3.0"
 }
+
+#with domain
+terraform {
+  source = "tfr://registry.domain.com/abc/helloworld/aws?version=1.0.0"
+}

lib/modules/manager/terragrunt/extract.spec.ts

@@ -30,6 +30,13 @@ describe('modules/manager/terragrunt/extract', () => {
             depType: 'terragrunt',
           },
           {},
+          {
+            currentValue: '1.0.0',
+            datasource: 'terraform-module',
+            depName: 'abc/helloworld/aws',
+            depType: 'terragrunt',
+            registryUrls: ['https://registry.domain.com'],
+          },
         ],
       });
     });

lib/modules/manager/terragrunt/modules.ts

@@ -72,6 +72,9 @@ export function analyseTerragruntModule(
       tfrVersionMatch.groups.cloud;
     dep.currentValue = tfrVersionMatch.groups.currentValue;
     dep.datasource = TerraformModuleDatasource.id;
+    if (tfrVersionMatch.groups.registry) {
+      dep.registryUrls = [`https://${tfrVersionMatch.groups.registry}`];
+    }
   } else if (source) {
     const moduleParts = source.split('//')[0].split('/');
     if (moduleParts[0] === '..') {