Update rule-RsaNoPadding.yml and test-RsaNoPadding.java

Fixes gitlab-org/gitlab#427684 (closed)

Modified the rule-RsaNoPadding.yml file to reflect following 2 changes:

1. Not Highlight - var cipher = Cipher.getInstance("AES/GCM/NoPadding");
2. Highlight -

String cipher2 = "RSA/NONE/NoPadding";
Cipher.getInstance(cipher2);

Modified the test cases (test-RsaNoPadding.java) to reflect following 2 changes:

1. Add 2 new True Positive testcases

// first test case
Cipher.getInstance("RSA/ECB/NoPadding");
//second test case
String cipher2 = "RSA/ECB/NoPadding";
Cipher.getInstance(cipher2);

2. Add semgrep test annotations.