Java ruleset enhancements

This MR addresses the following SAST rule quality issues:

• Update Java rule-SSRF.yml to match more cases under java.net.* package
• Add Java rule rule-WeakTLSProtocolVersion.yml to detect weak TLS versions

Relevant Issue Numbers

• https://gitlab.com/gitlab-com/sec-sub-department/section-sec-request-for-help/-/issues/54
• https://gitlab.com/gitlab-com/sec-sub-department/section-sec-request-for-help/-/issues/42