[FIR] FirRenderer: render name for scripts

A script name is important information, so it is better to render it.
This also will fix the inconsistency with redundant space after 'SCRIPT:'.

compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/script.lazyBodies.txt

@@ -1,5 +1,5 @@
 FILE: script.kts
-    SCRIPT:
+    SCRIPT: <script-script.kts>
 
         public? final? class Builder : R|kotlin/Any| {
             public? constructor(): R|Builder| {

compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/script.txt

@@ -1,5 +1,5 @@
 FILE: script.kts
-    SCRIPT:
+    SCRIPT: <script-script.kts>
 
         public? final? class Builder : R|kotlin/Any| {
             public? [ContainingClassKey=Builder] constructor(): R|Builder| {