[FIR] FirScriptConfiguratorExtensionImpl: provide source for script parameters

We need this source to be able to find the parent declaration

^KT-62693 Fixed

analysis/analysis-api/testData/referenceResolve/ScriptArgument.kts

@@ -0,0 +1,3 @@
+fun foo() {
+    arg<caret>s
+}

analysis/analysis-api/testData/referenceResolve/ScriptArgument.txt

@@ -0,0 +1,2 @@
+Resolved to:
+0: (in <local>: <script-ScriptArgument.kts>) val args: kotlin.Array<kotlin.String>

analysis/analysis-api/testData/symbols/symbolByReference/scriptArgument.kts

@@ -0,0 +1,5 @@
+// DO_NOT_CHECK_NON_PSI_SYMBOL_RESTORE
+
+fun foo() {
+    ar<caret>gs
+}

analysis/analysis-api/testData/symbols/symbolByReference/scriptArgument.pretty.txt

@@ -0,0 +1 @@
+val args: kotlin.Array<kotlin.String>

analysis/analysis-api/testData/symbols/symbolByReference/scriptArgument.txt

@@ -0,0 +1,22 @@
+KtLocalVariableSymbol:
+  annotationsList: []
+  callableIdIfNonLocal: null
+  contextReceivers: []
+  isExtension: false
+  isVal: true
+  name: args
+  origin: PLUGIN
+  receiverParameter: null
+  returnType: KtUsualClassType:
+    annotationsList: []
+    ownTypeArguments: [
+      KtUsualClassType:
+        annotationsList: []
+        ownTypeArguments: []
+        type: kotlin/String
+    ]
+    type: kotlin/Array<kotlin/String>
+  symbolKind: LOCAL
+  typeParameters: []
+  getContainingModule: KtScriptModule "Script scriptArgument.kts"
+  deprecationStatus: null