fix NO_VERIFY_OID build in GetOID

[JeremiahM37]

Description

Move actualOid and actualOidSz declarations out of the #ifndef NO_VERIFY_OID block in GetOID() and drop the assignment guard. They're used unconditionally by wc_oid_sum() (added in 1123516), so gating the declarations on NO_VERIFY_OID broke compilation.
NO_VERIFY_OID + WOLFSSL_FPKI was broken for the same reason.

Fixes #10423

Credit

Thanks to @cpsource for the proposed patch

Testing

Pre-patch with -DNO_VERIFY_OID: reproduces reporter's compile error.
Post-patch with -DNO_VERIFY_OID, -DNO_VERIFY_OID -DWOLFSSL_FPKI, and default: all build clean. make check passes.

[dgarske]

Please add an os-check for the NO_VERIFY_OID in the build matrix. Our CI should have caught this.

[JeremiahM37]

Please add an os-check for the NO_VERIFY_OID in the build matrix. Our CI should have caught this.

Done

[github-actions]

MemBrowse Memory Report

No memory changes detected for:

• gcc-arm-cortex-m4
• gcc-arm-cortex-m4-baremetal
• gcc-arm-cortex-m4-min-ecc
• gcc-arm-cortex-m4-tls12