Add utility method to convert JKS/PKCS12 KeyStore streams to WKS type

[cconlon]

This PR adds a JCE-level utility method which can be used to convert existing JKS/PKCS12 KeyStore InputStream objects into a WKS (WolfSSLKeyStore) type:

public static InputStream convertKeyStoreToWKS(InputStream stream, 
    char[] oldPassword, char[] newPassword, boolean failOnInsertErrors)
    throws IOException, NoSuchProviderException {

This can be useful if WKS type KeyStores need to be used for FIPS compliance, but existing JKS/PKCS12 types need to be converted. This helper method itself will call Sun providers for reading the JKS/PKCS12 entries, before storing them back into a WKS KeyStore. Caution should be taken that calling this code can result in calling down to non-FIPS validated cryptography in those cases when using wolfCrypt FIPS underneath wolfJCE.

This PR also updates README_JCE.md with usage notes, and adds new JUnit tests for this utility method:

    [junit] JCE WolfCryptUtils Class
    [junit] 	testNullPassword
    [junit] 	testConvertP12ToWksWithoutMapping
    [junit] 	testConvertCacertsToWks
    [junit] 	testConvertWksToWks
    [junit] 	testConvertP12ToWksWithMapping
    [junit] 	testNullInputStream
    [junit] 	testConvertJksToWksWithoutMapping
    [junit] 	testConvertJksToWksWithMapping

This PR also contains one small fix to WolfSSLKeyStore.java, specifically:

• Use the local KDF iterations inside an internal WKSPrivateKey when calling getDecryptedKey() instead of using the KDF iteration default set by the Security properties. When decrypting, we need to use the local set value, incase the KDF iterations have changed at the system level. The system level iteration count will still be used for the creation of any new key derivations.

ZD 17962

[Copilot]

Pull Request Overview

This PR adds a new JCE-level utility method to convert JKS/PKCS12 KeyStore streams to the WKS format and includes associated tests, documentation updates, and a minor fix in WolfSSLKeyStore.

• Introduces WolfCryptUtil.convertKeyStoreToWKS() for runtime KeyStore format conversion.
• Updates the test suite to validate the new conversion method.
• Fixes the usage of local KDF iterations in WolfSSLKeyStore and enhances log messaging.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/test/java/com/wolfssl/provider/jce/test/WolfSSLKeyStoreTest.java	Removed an extraneous comment.
src/test/java/com/wolfssl/provider/jce/test/WolfJCETestSuite.java	Updated test suite to include new utility tests.
src/main/java/com/wolfssl/provider/jce/WolfSSLKeyStore.java	Adjusted KDF iterations usage and added logging for null InputStreams.
src/main/java/com/wolfssl/provider/jce/WolfCryptUtil.java	Added a new utility method for KeyStore conversion with comprehensive format detection.
scripts/infer.sh	Updated static analysis configuration to include the new utility class.
README_JCE.md	Revised documentation to include instructions and usage details for the new conversion method.

Comments suppressed due to low confidence (1)

src/test/java/com/wolfssl/provider/jce/test/WolfSSLKeyStoreTest.java:1432

• [nitpick] It appears that an extraneous comment was removed. Ensure that any comments in test files are meaningful and align with the intended documentation for future maintainability.

//CHRIS