FIR IDE: move analysis api fir testdata to the analysis directory

analysis/analysis-api/testData/referenceResolve/arrayAccess/get.kt

@@ -0,0 +1,4 @@
+fun a () {
+    val list = mutableListOf(1)
+    println(list<caret>[0])
+}

analysis/analysis-api/testData/referenceResolve/arrayAccess/get.txt

@@ -0,0 +1,2 @@
+Resolved to:
+0: (in kotlin.collections.MutableList) operator fun get(index: kotlin.Int): kotlin.Int

analysis/analysis-api/testData/referenceResolve/arrayAccess/set.kt

@@ -0,0 +1,4 @@
+fun a () {
+    val list = mutableListOf(1)
+    list<caret>[0] = 1
+}

analysis/analysis-api/testData/referenceResolve/arrayAccess/set.txt

@@ -0,0 +1,2 @@
+Resolved to:
+0: (in kotlin.collections.MutableList) operator fun set(index: kotlin.Int, element: kotlin.Int): kotlin.Int