refactor to EcExportHsKey

[effbiae]

Description

refactor duplicate code to EcExportHsKey()

Checklist

• added tests
• updated/added doxygen
• updated appropriate READMEs
• Updated manual and documentation

[devin-ai-integration]

🛟 Devin Lifeguard found 1 likely issues in this PR

• check-all-return-codes snippet: Inspect the code paths after the switch-case in SendClientKeyExchange() to verify that the return value ‘ret’ set by EcExportHsKey is examined and, if negative, causes the function to abort; add an explicit “if (ret != 0) { ERROR_OUT(ECC_EXPORT_ERROR, exit_scke); }” immediately after the EcExportHsKey call if such a check does not already exist later.

@effbiae
please take a look at the above issues which Devin flagged. Devin will not fix these issues automatically.

[wolfSSL-Bot]

Can one of the admins verify this patch?

[dgarske]

Okay to test. Contributor agreement on file. Thank you @effbiae

[dgarske]

Jenkins retest this please "FIPS v2 test"