Crypto: Fix bug in weak symmetric cipher query

[bdrodes]

Weak symmetric cipher looks to see if the algorithm is not AES but is missing a type check to limit to just symmetric ciphers.

[Copilot]

Pull Request Overview

This PR fixes a bug in the weak symmetric cipher detection query where the logic was incorrectly flagging non-symmetric cipher algorithms. The fix adds a type check to ensure only symmetric ciphers are evaluated.

• Added type constraint to limit detection to symmetric ciphers only
• Added test case with PBKDF2WithHmacSHA256 (a key derivation function, not a symmetric cipher) to verify the fix
• Updated test expectations with line number adjustments due to the new test case

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
WeakSymmetricCipher.qll	Added instanceof TSymmetricCipher constraint to ensure only symmetric cipher algorithms are checked
Test.java	Added test case using SecretKeyFactory with PBKDF2WithHmacSHA256 to verify non-symmetric algorithms are not flagged
WeakSymmetricCipher.expected	Updated expected test results with adjusted line numbers and added numbering prefix

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