FIR IDE: move analysis api fir main sources to the analysis directory

analysis/low-level-api-fir/build.gradle.kts

@@ -13,7 +13,7 @@ dependencies {
     compile(project(":compiler:fir:checkers:checkers.jvm"))
     compile(project(":compiler:fir:java"))
     compile(project(":compiler:backend.common.jvm"))
-    testCompile(project(":idea-frontend-fir"))
+    testCompile(project(":analysis:analysis-api-fir"))
     implementation(project(":compiler:ir.psi2ir"))
     implementation(project(":compiler:fir:entrypoint"))
     implementation(project(":analysis:analysis-api-providers"))
@@ -66,5 +66,13 @@ projectTest(jUnit5Enabled = true) {
     useJUnitPlatform()
 }
 
+allprojects {
+    tasks.withType<org.jetbrains.kotlin.gradle.dsl.KotlinCompile<*>> {
+        kotlinOptions {
+            freeCompilerArgs += "-opt-in=org.jetbrains.kotlin.fir.symbols.SymbolInternals"
+        }
+    }
+}
+
 testsJar()