FIR body resolve: use one scope session per module

Gives significant (~5%) performance boost mainly due to use-site scope caching

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirBodyResolveTransformer.kt

@@ -1020,12 +1020,19 @@ class FirDesignatedBodyResolveTransformer(
 
 @Deprecated("It is temp", level = DeprecationLevel.WARNING, replaceWith = ReplaceWith("TODO(\"что-то нормальное\")"))
 class FirImplicitTypeBodyResolveTransformerAdapter : FirTransformer<Nothing?>() {
+    private val scopeSession = ScopeSession()
+
     override fun <E : FirElement> transformElement(element: E, data: Nothing?): CompositeTransformResult<E> {
         return element.compose()
     }
 
     override fun transformFile(file: FirFile, data: Nothing?): CompositeTransformResult<FirFile> {
-        val transformer = FirBodyResolveTransformer(file.fileSession, phase = FirResolvePhase.IMPLICIT_TYPES_BODY_RESOLVE, implicitTypeOnly = true)
+        val transformer = FirBodyResolveTransformer(
+            file.fileSession,
+            phase = FirResolvePhase.IMPLICIT_TYPES_BODY_RESOLVE,
+            implicitTypeOnly = true,
+            scopeSession = scopeSession
+        )
         return file.transform(transformer, null)
     }
 }
@@ -1033,13 +1040,20 @@ class FirImplicitTypeBodyResolveTransformerAdapter : FirTransformer<Nothing?>()
 
 @Deprecated("It is temp", level = DeprecationLevel.WARNING, replaceWith = ReplaceWith("TODO(\"что-то нормальное\")"))
 class FirBodyResolveTransformerAdapter : FirTransformer<Nothing?>() {
+    private val scopeSession = ScopeSession()
+
     override fun <E : FirElement> transformElement(element: E, data: Nothing?): CompositeTransformResult<E> {
         return element.compose()
     }
 
     override fun transformFile(file: FirFile, data: Nothing?): CompositeTransformResult<FirFile> {
         // Despite of real phase is EXPRESSIONS, we state IMPLICIT_TYPES here, because DECLARATIONS previous phase is OK for us
-        val transformer = FirBodyResolveTransformer(file.fileSession, phase = FirResolvePhase.IMPLICIT_TYPES_BODY_RESOLVE, implicitTypeOnly = false)
+        val transformer = FirBodyResolveTransformer(
+            file.fileSession,
+            phase = FirResolvePhase.IMPLICIT_TYPES_BODY_RESOLVE,
+            implicitTypeOnly = false,
+            scopeSession = scopeSession
+        )
         return file.transform(transformer, null)
     }
 }

compiler/fir/resolve/tests/org/jetbrains/kotlin/fir/AbstractFirDiagnosticsSmokeTest.kt

@@ -73,6 +73,7 @@ abstract class AbstractFirDiagnosticsSmokeTest : BaseDiagnosticsTest() {
 
         val firFiles = mutableListOf<FirFile>()
 
+        // TODO: make module/session/transformer handling like in AbstractFirMultiModuleTest (IDE)
         for ((testModule, testFilesInModule) in groupedByModule) {
             val ktFiles = getKtFiles(testFilesInModule, true)