[light classes] optimize accessors retrieval

Avoid expensive calls to `navigationElement` for methods
that cannot be getters/setters and would be filtered later.
Repeat partly naming generation strategy.

Merge-request: KT-MR-10689
Merged-by: Anna Kozlova <Anna.Kozlova@jetbrains.com>

analysis/symbol-light-classes/testData/lightElements/mangledName.kt

@@ -0,0 +1,5 @@
+// EXPECTED: org.jetbrains.kotlin.light.classes.symbol.methods.SymbolLightAccessorMethod
+// EXPECTED: org.jetbrains.kotlin.light.classes.symbol.fields.SymbolLightFieldForProperty
+class Foo {
+    internal val <caret> p: Int = 42
+}