`UnnecessaryExplicitTypeArguments` should work within lambdas too

[greg-at-moderne]

Problem statement

See org.openrewrite.staticanalysis.UnnecessaryExplicitTypeArgumentsTest#withinLambda.

rewrite-static-analysis/src/test/java/org/openrewrite/staticanalysis/UnnecessaryExplicitTypeArgumentsTest.java

Lines 77 to 107 in 0a470e4

	rewriteRun(
	//language=java
	java(
	"""
	import java.util.function.Function;
	class Test {
	Function<Object, Object> f = (d1) -> {
	return this.<Object>test();
	};
	<T> T test() {
	return this.test();
	}
	}
	""",
	"""
	import java.util.function.Function;
	class Test {
	Function<Object, Object> f = (d1) -> {
	return this.test();
	};
	<T> T test() {
	return this.test();
	}
	}
	"""
	)
	);