[FIR2IR] Use single IrBuiltInsOverFir for all MPP source modules

^KT-56229 Fixed

compiler/testData/codegen/box/multiplatform/multiModule/independentCommonSourceModules.kt

@@ -0,0 +1,20 @@
+// TARGET_BACKEND: JVM_IR
+// !LANGUAGE: +MultiPlatformProjects
+
+// MODULE: common1
+// TARGET_PLATFORM: Common
+// FILE: common1.kt
+
+fun o() = "O"
+
+// MODULE: common2
+// TARGET_PLATFORM: Common
+// FILE: common2.kt
+
+fun k() = "K"
+
+// MODULE: jvm()()(common1, common2)
+// TARGET_PLATFORM: JVM
+// FILE: main.kt
+
+fun box() = o() + k()