fix: align test suite version extraction with Obtainium behavior. add missing matchGroupToUse to app configs

src/applications.json

@@ -289,6 +289,7 @@
         "customLinkFilterRegex": "Play-release\\.apk",
         "defaultPseudoVersioningMethod": "APKLinkHash",
         "versionExtractionRegEx": "/(\\d+\\.\\d+)/",
+        "matchGroupToUse": "$1",
         "about": "PlayStation 2 emulator"
       },
       "categories": [
@@ -416,6 +417,7 @@
         "sortByLastLinkSegment": true,
         "defaultPseudoVersioningMethod": "APKLinkHash",
         "versionExtractionRegEx": "scummvm-(\\d+(?:\\.\\d+)+)-android",
+        "matchGroupToUse": "$1",
         "versionDetection": false,
         "about": "A program which allows you to run certain classic graphical adventure and role-playing games, provided you already have their data files."
       },
@@ -675,6 +677,7 @@
       "additionalSettings": {
         "trackOnly": true,
         "versionExtractionRegEx": "(T[\\d]+(?:\\.\\d+)?(?:hf)?)",
+        "matchGroupToUse": "$1",
         "versionDetection": false,
         "autoApkFilterByArch": false,
         "appName": "Mr. Purple Turnip Drivers"
@@ -760,6 +763,7 @@
       "preferredApkIndex": 0,
       "additionalSettings": {
         "versionExtractionRegEx": "v[\\d.]+_v([\\d.]+)",
+        "matchGroupToUse": "$1",
         "versionDetection": false,
         "apkFilterRegEx": "PXPlay_Android.*\\.apk"
       },