feat: detect when full license text has been provided and preserve as separate field (#3450)

* feat: add full text field to syft license struct
---------
Signed-off-by: Christopher Angelo Phillips <32073428+spiffcs@users.noreply.github.com>

schema/json/schema-latest.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://json-schema.org/draft/2020-12/schema",
-  "$id": "anchore.io/schema/syft/json/16.0.26/document",
+  "$id": "anchore.io/schema/syft/json/16.0.27/document",
   "$ref": "#/$defs/Document",
   "$defs": {
     "AlpmDbEntry": {
@@ -1391,6 +1391,9 @@
         "value": {
           "type": "string"
         },
+        "fullText": {
+          "type": "string"
+        },
         "spdxExpression": {
           "type": "string"
         },
@@ -1416,6 +1419,7 @@
       "type": "object",
       "required": [
         "value",
+        "fullText",
         "spdxExpression",
         "type",
         "urls",