FIR: Set resolve phase to BODY_RESOLVE for SAM constructor value

parameters.

This was causing exceptions with analysis API trying to resolve the
synthetic FirValueParameter because it could not find a KtDeclaration
for it. Using BODY_RESOLVE should be safe; the SAM constructor function
is also on BODY_RESOLVE and the type of the value parameter is known.

analysis/analysis-api/testData/referenceResolve/SamConstructor.kt

@@ -1,2 +1,2 @@
-val c = java.util.<caret>Comparator {(x: Int, y: Int) -> 1}
+val c = java.util.<caret>Comparator {x: Int, y: Int -> 1}