FIR IDE: move low level api testdata sources to the analysis directory

analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/propertyDelegate.kt

@@ -0,0 +1,2 @@
+// WITH_STDLIB
+val x <expr>by lazy {1}</expr>

analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/propertyDelegate.txt

@@ -0,0 +1,8 @@
+KT element: KtPropertyDelegate
+FIR element: FirFunctionCallImpl
+
+FIR element rendered:
+R|kotlin/lazy|<R|kotlin/Int|>(<L> = lazy@fun <anonymous>(): R|kotlin/Int| <inline=NoInline>  {
+    ^ Int(1)
+}
+)

analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/propertyDelegateExpression.kt

@@ -0,0 +1,2 @@
+// WITH_STDLIB
+val x by <expr>lazy {1}</expr>

analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/propertyDelegateExpression.txt

@@ -0,0 +1,8 @@
+KT element: KtCallExpression
+FIR element: FirFunctionCallImpl
+
+FIR element rendered:
+R|kotlin/lazy|<R|kotlin/Int|>(<L> = lazy@fun <anonymous>(): R|kotlin/Int| <inline=NoInline>  {
+    ^ Int(1)
+}
+)