smb: client: clear ce->tgthint in free_tgts()

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-89636 · Microsoft / collected KEV context

cve-program · CVE-2026-89636

• https://git.kernel.org/stable/c/14f60e959b5ac813715ff72e127beb3584ddabf6
• https://git.kernel.org/stable/c/3ff9462bb7a06d8d32a1dc02d39580b078ec9e55
• https://git.kernel.org/stable/c/7507bd1885643d0461a6017767492450af1ce2a3
• https://git.kernel.org/stable/c/9ab46a13798a61d9d020b01d4e57efdabe6624fa
• https://git.kernel.org/stable/c/5baab40404a9393bcc0b7b8f1950bf2c307e0984
• https://git.kernel.org/stable/c/b1b741cf8e7ce1b91d937e23decd3d3358748700

No related operational record is retained in the current change model.