MT#61304 service-ngcp-api: unify CSC web interface tests

Fixes:

| Error: could not read json data in /etc/ngcp-system-tests/900_service-ngcp-api.yaml: yaml: unmarshal errors:
|   line 61: mapping key "curl --insecure -L http://192.168.211.210/" already defined at line 4
|   line 68: mapping key "curl --insecure -L https://192.168.211.210/" already defined at line 11

Merge the identical curl command lines into one single test.

This is being detected by new goss versions from Debian trixie as
errors, and causing the entire ngcp-system-tests run to fail.

Change-Id: If9fb68dd182891ae742a4af07ebe259d914c3c91

templates/900_service-ngcp-api.yaml.tt2

@@ -44,6 +44,7 @@ command:
     exit-status: 0
     stdout:
       - <title>Customer Self-Care Web Interface</title>
+      - "/Subscriber Sign In|<title>Customer Self-Care Web Interface</title>/"
     stderr: []
     timeout: 30000
 
@@ -51,6 +52,7 @@ command:
     exit-status: 0
     stdout:
       - <title>Customer Self-Care Web Interface</title>
+      - "/Subscriber Sign In|<title>Customer Self-Care Web Interface</title>/"
     stderr: []
     timeout: 30000
 
@@ -97,20 +99,6 @@ command:
     stderr: []
     timeout: 30000
 
-  "curl --insecure -L http://[% web_ext_ips.0 %]/":
-    exit-status: 0
-    stdout:
-      - "/Subscriber Sign In|<title>Customer Self-Care Web Interface</title>/"
-    stderr: []
-    timeout: 30000
-
-  "curl --insecure -L https://[% web_ext_ips.0 %]/":
-    exit-status: 0
-    stdout:
-      - "/Subscriber Sign In|<title>Customer Self-Care Web Interface</title>/"
-    stderr: []
-    timeout: 30000
-
   "curl --insecure -L http://[% web_int_ips.0 %]:1443/api/":
     exit-status: 0
     stdout: