Support creating beans from Kotlin callable references

This commit updates Kotlin beans DSL in order to support
creating beans using callable references with autowired
parameters. Type resolution is implemented using Kotlin
reified type parameters without requiring reflection.

Closes gh-21845

spring-context/src/test/kotlin/org/springframework/context/support/BeanDefinitionDslTests.kt

@@ -156,6 +156,19 @@ class BeanDefinitionDslTests {
 		}
 		context.getBean<Baz>()
 	}
+
+	@Test  // gh-21845
+	fun `Declare beans leveraging callable reference`() {
+		val beans = beans {
+			bean<Bar>()
+			bean(::baz)
+		}
+		val context = GenericApplicationContext().apply {
+			beans.initialize(this)
+			refresh()
+		}
+		context.getBean<Baz>()
+	}
 	
 }
 
@@ -164,3 +177,5 @@ class Bar
 class Baz(val bar: Bar)
 class FooFoo(val name: String)
 class BarBar(val foos: Collection<Foo>)
+
+fun baz(bar: Bar) = Baz(bar)