[FIR LT] Unmute some stepping and local variable tests

Corresponding tests were fixed together with #KT-56982, #KT-56913,
#KT-56926

compiler/testData/debug/localVariables/constructors/multipleConstructors.kt

@@ -1,5 +1,3 @@
-// IGNORE_BACKEND_K2_LIGHT_TREE: JVM_IR
-//   Reason: KT-56755
 // FILE: test.kt
 open class Base(i: Int)
 
@@ -17,35 +15,35 @@ fun box() {
 }
 
 // EXPECTATIONS JVM JVM_IR
-// test.kt:15 box:
-// test.kt:7 <init>: p:int=3:int
-// test.kt:6 <init>:
-// test.kt:4 <init>: i:int=1:int
-// test.kt:6 <init>:
-// test.kt:8 <init>: p:int=3:int
+// test.kt:13 box:
+// test.kt:5 <init>: p:int=3:int
+// test.kt:4 <init>:
+// test.kt:2 <init>: i:int=1:int
+// test.kt:4 <init>:
+// test.kt:6 <init>: p:int=3:int
 // EXPECTATIONS JVM_IR
-// test.kt:9 <init>: p:int=3:int, a:int=2:int
+// test.kt:7 <init>: p:int=3:int, a:int=2:int
 // EXPECTATIONS JVM JVM_IR
+// test.kt:13 box:
+// test.kt:14 box:
+// test.kt:9 <init>: p1:int=4:int, p2:int=5:int
+// test.kt:4 <init>:
+// test.kt:2 <init>: i:int=1:int
+// test.kt:4 <init>:
+// test.kt:9 <init>: p1:int=4:int, p2:int=5:int
+// test.kt:14 box:
 // test.kt:15 box:
-// test.kt:16 box:
-// test.kt:11 <init>: p1:int=4:int, p2:int=5:int
-// test.kt:6 <init>:
-// test.kt:4 <init>: i:int=1:int
-// test.kt:6 <init>:
-// test.kt:11 <init>: p1:int=4:int, p2:int=5:int
-// test.kt:16 box:
-// test.kt:17 box:
 
 // EXPECTATIONS JS_IR
+// test.kt:13 box:
+// test.kt:5 Derived_init_$Init$: p=3:number
+// test.kt:4 <init>:
+// test.kt:2 <init>: i=1:number
+// test.kt:4 <init>:
+// test.kt:6 Derived_init_$Init$: p=3:number
+// test.kt:14 box:
+// test.kt:9 Derived_init_$Init$: p1=4:number, p2=5:number
+// test.kt:4 <init>:
+// test.kt:2 <init>: i=1:number
+// test.kt:4 <init>:
 // test.kt:15 box:
-// test.kt:7 Derived_init_$Init$: p=3:number
-// test.kt:6 <init>:
-// test.kt:4 <init>: i=1:number
-// test.kt:6 <init>:
-// test.kt:8 Derived_init_$Init$: p=3:number
-// test.kt:16 box:
-// test.kt:11 Derived_init_$Init$: p1=4:number, p2=5:number
-// test.kt:6 <init>:
-// test.kt:4 <init>: i=1:number
-// test.kt:6 <init>:
-// test.kt:17 box:

compiler/testData/debug/localVariables/constructors/property.kt

@@ -1,5 +1,3 @@
-// IGNORE_BACKEND_K2_LIGHT_TREE: JVM_IR
-//   Reason: KT-56755
 // FILE: test.kt
 class F(val a: String)
 
@@ -8,13 +6,13 @@ fun box() {
 }
 
 // EXPECTATIONS JVM JVM_IR
-// test.kt:7 box:
-// test.kt:4 <init>: a:java.lang.String="foo":java.lang.String
-// test.kt:7 box:
-// test.kt:8 box:
+// test.kt:5 box:
+// test.kt:2 <init>: a:java.lang.String="foo":java.lang.String
+// test.kt:5 box:
+// test.kt:6 box:
 
 // EXPECTATIONS JS_IR
-// test.kt:7 box:
-// test.kt:4 <init>: a="foo":kotlin.String
-// test.kt:4 <init>: a="foo":kotlin.String
-// test.kt:8 box:
+// test.kt:5 box:
+// test.kt:2 <init>: a="foo":kotlin.String
+// test.kt:2 <init>: a="foo":kotlin.String
+// test.kt:6 box: