[LL FIR] rewrote in-block modifications logic

Now we will invalidate bodies for FIR declarations
immediately after in-block modifications in these declarations
We assume that such in-block modifications can happen
only under write action,
so it should be safe to make changes for FirFile

^KT-59687 Fixed
^KT-59199 Fixed
^KTIJ-26066 Fixed

analysis/low-level-api-fir/testdata/inBlockModification/contract.kt

@@ -0,0 +1,9 @@
+import kotlin.contracts.InvocationKind
+
+inline fun f<caret>oo(block: () -> Unit) {
+    kotlin.contracts.contract {
+        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
+    }
+
+    block()
+}