Fix metadata deserialization for context receivers with type table

In DeserializedClassDescriptor and MemberDeserializer, only the
`contextReceiverTypeList` field was used, and not
`contextReceiverTypeIdList` which is used when `-Xuse-type-table` is
enabled. The convention is to use a bunch of utilities declared in
`protoTypeTableUtil.kt` which deal with both methods of reading types.
Also, simplify the deserialization code in FIR (which was correct for
some reason).

compiler/testData/loadJava/compiledKotlin/contextReceivers/SimpleContextReceivers.kt

@@ -0,0 +1,13 @@
+// !LANGUAGE: +ContextReceivers
+
+package test
+
+interface A
+interface B
+
+context(A) class C {
+    context(B) fun f() {}
+}
+
+context(A) fun g() {}
+context(B) val h: Int get() = 42

compiler/testData/loadJava/compiledKotlin/contextReceivers/SimpleContextReceivers.txt

@@ -0,0 +1,16 @@
+package test
+
+context(test.B) public val h: kotlin.Int
+    context(test.B) public fun `<get-h>`(): kotlin.Int
+context(test.A) public fun g(): kotlin.Unit
+
+public interface A {
+}
+
+public interface B {
+}
+
+context(test.A) public final class C {
+    /*primary*/ public constructor C()
+    context(test.B) public final fun f(): kotlin.Unit
+}