@ConfigProperty for `java.util.Duration` with defaultValue flagged as error in VS code

[Dougniel]

In a similar way to #612 with java.util.Duration, the following code generates an error in the VS Code UI:

    @ConfigProperty(name = "app.duration", defaultValue = "PT15M")
    Duration duration;

❌ The error message looks like that :

'PT15M' does not match the expected type of 'Duration'.microprofile-config(DEFAULT_VALUE_IS_WRONG_TYPE)

[fbricon]

Need to add something like :

case "java.time.Duration":
	return Duration.parse(value) != null;

in https://github.com/eclipse/lsp4mp/blob/aa2fb199ebbfc03ad542fd65cfed95f518703b13/microprofile.jdt/org.eclipse.lsp4mp.jdt.core/src/main/java/org/eclipse/lsp4mp/jdt/internal/config/java/MicroProfileConfigASTValidator.java#L311 and catch any exception

@Dougniel do you feel like opening a PR?