[FIR] Give external package fragments different module descriptors.

The inliner uses module descriptors to figure out if it needs to
regenerate objects.

We should avoid the use of descriptors in the inliner, but this
works as a first quick fix.

compiler/testData/codegen/box/compileKotlinAgainstKotlin/copySamOnInline.kt

@@ -1,5 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
-// FIR status: class should be regenerated, but test.AKt$sam$i$java_util_concurrent_Callable$0
 // FULL_JDK
 // WITH_STDLIB
 

compiler/testData/codegen/box/compileKotlinAgainstKotlin/copySamOnInline2.kt

@@ -1,5 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
-// FIR status: class should be regenerated, but test.AKt$sam$i$java_util_concurrent_Callable$0
 // FULL_JDK
 // WITH_STDLIB
 

compiler/testData/codegen/box/compileKotlinAgainstKotlin/defaultLambdaRegeneration.kt

@@ -1,5 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
-// FIR status: fail 1 : class test.AKt$test$1$1 ==  class test.AKt$test$1$1
 // TARGET_BACKEND: JVM
 // WITH_STDLIB
 

compiler/testData/codegen/box/compileKotlinAgainstKotlin/defaultLambdaRegeneration2.kt

@@ -1,5 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
-// FIR status: fail 1 : class test.AKt$test$1$1 ==  class test.AKt$test$1$1
 // TARGET_BACKEND: JVM
 // WITH_STDLIB