[FIR] Save declarations in metadata in source order

^KT-54792 Fixed
^KT-54801
^KT-54800

compiler/testData/loadJava/compiledKotlin/fun/InheritMethodsDifferentReturnTypesAndVisibilities.fir.k1.txt

@@ -14,4 +14,3 @@ public abstract interface Super2 : R|kotlin/Any| {
     private final fun foo(): R|kotlin/String|
 
 }
-

compiler/testData/loadJava/compiledKotlin/fun/InheritMethodsDifferentReturnTypesAndVisibilities.fir.k2.txt

@@ -0,0 +1,16 @@
+public abstract interface Sub : R|test/Super1|, R|test/Super2| {
+}
+
+public abstract interface Super1 : R|kotlin/Any| {
+    public abstract fun foo(): R|kotlin/CharSequence|
+
+    private final fun bar(): R|kotlin/String|
+
+}
+
+public abstract interface Super2 : R|kotlin/Any| {
+    private final fun foo(): R|kotlin/String|
+
+    public abstract fun bar(): R|kotlin/CharSequence|
+
+}

compiler/testData/loadJava/compiledKotlin/fun/PropagateDeepSubclass.fir.k2.txt

@@ -0,0 +1,18 @@
+public abstract interface A : R|kotlin/Any| {
+    public open fun foo(): R|kotlin/Unit|
+
+    public open fun bar(): R|kotlin/Unit|
+
+}
+
+public open class B : R|test/A| {
+    public constructor(): R|test/B|
+
+}
+
+public final class C : R|test/B| {
+    public open fun bar(): R|kotlin/Unit|
+
+    public constructor(): R|test/C|
+
+}