[LL FIR] LLFirContractsLazyResolver: avoid transformation for functions with implicit type

Legacy (current) contracts can exist only on functions with bodies.
This change also should improve memory consumption because we will
less frequently calculate bodies.

^KT-55750

analysis/low-level-api-fir/testData/lazyResolve/functions/functionParameterScript.txt

@@ -85,9 +85,7 @@ FILE: [ResolvedTo(IMPORTS)] functionParameterScript.kts
     SCRIPT: [ResolvedTo(TYPES)] <script-functionParameterScript.kts>
         [ResolvedTo(RAW_FIR)] lval args: R|kotlin/Array<kotlin/String>|
 
-        public final [ResolvedTo(CONTRACTS)] fun foo([ResolvedTo(CONTRACTS)] param: R|kotlin/Int|): <implicit> {
-            ^foo String(boo)
-        }
+        public final [ResolvedTo(CONTRACTS)] fun foo([ResolvedTo(CONTRACTS)] param: R|kotlin/Int|): <implicit> { LAZY_BLOCK }
 
 
 IMPLICIT_TYPES_BODY_RESOLVE:
@@ -132,3 +130,4 @@ FILE: [ResolvedTo(BODY_RESOLVE)] functionParameterScript.kts
         public final [ResolvedTo(BODY_RESOLVE)] fun foo([ResolvedTo(BODY_RESOLVE)] param: R|kotlin/Int|): R|kotlin/String| {
             ^foo String(boo)
         }
+