Enable providing a different default encoding id for the PasswordEncoderFactories#createDelegatingPasswordEncoder

Summary

It would be good if we can pass a custom encoding id to the PasswordEncoderFactories#createDelegatingPasswordEncoder. This way we can use the defaults from Spring Security, but pick a default encoder.

Actual Behavior

public static PasswordEncoder createDelegatingPasswordEncoder() {
    String encodingId = "bcrypt";
    Map<String, PasswordEncoder> encoders = new HashMap<>();
    encoders.put(encodingId, new BCryptPasswordEncoder());
    encoders.put("ldap", new LdapShaPasswordEncoder());
    encoders.put("MD4", new Md4PasswordEncoder());
    encoders.put("MD5", new MessageDigestPasswordEncoder("MD5"));
    encoders.put("noop", NoOpPasswordEncoder.getInstance());
    encoders.put("pbkdf2", new Pbkdf2PasswordEncoder());
    encoders.put("scrypt", new SCryptPasswordEncoder());
    encoders.put("SHA-1", new MessageDigestPasswordEncoder("SHA-1"));
    encoders.put("SHA-256", new MessageDigestPasswordEncoder("SHA-256"));
    encoders.put("sha256", new StandardPasswordEncoder());

    return new DelegatingPasswordEncoder(encodingId, encoders);
}

Expected Behavior

public static PasswordEncoder createDelegatingPasswordEncoder(String encodingId) {
    // perform validation that the encoding id is within the known ids
    Map<String, PasswordEncoder> encoders = new HashMap<>();
    encoders.put("bcrypt", new BCryptPasswordEncoder());
    encoders.put("ldap", new LdapShaPasswordEncoder());
    encoders.put("MD4", new Md4PasswordEncoder());
    encoders.put("MD5", new MessageDigestPasswordEncoder("MD5"));
    encoders.put("noop", NoOpPasswordEncoder.getInstance());
    encoders.put("pbkdf2", new Pbkdf2PasswordEncoder());
    encoders.put("scrypt", new SCryptPasswordEncoder());
    encoders.put("SHA-1", new MessageDigestPasswordEncoder("SHA-1"));
    encoders.put("SHA-256", new MessageDigestPasswordEncoder("SHA-256"));
    encoders.put("sha256", new StandardPasswordEncoder());

    return new DelegatingPasswordEncoder(encodingId, encoders);
}

public static PasswordEncoder createDelegatingPasswordEncoder() {
    return createDelegatingPasswordEncoder("bcrypt");
}

Version

5.0.7.RELEASE

Start at PasswordEncoderFactories#createDelegatingPasswordEncoder and compare the requested overload with the existing no-argument behavior. Confirm that the supplied encoding ID is supported and that the no-argument entry point retains bcrypt as its default; done means callers can select another known default without duplicating the encoder map.