security/openssh-portable: Add KERB_GSSAPI patch for 9.8p1

This patch unbreaks the gssapi flavor.

• Update the distfile location.
• Remove files/extra-patch-gssapi-auth2-gss.c. The change is already present in the code so there is no need to carry this extra patch any further.
• Add -lgssapi_krb5 to CONFIGURE_LIBS. It fixes the following build errors:
  
  ld: error: undefined symbol: gss_indicate_mechs >>> referenced by sshd.c >>> sshd.o:(main) ld: error: undefined symbol: gss_release_oid_set >>> referenced by sshd.c >>> sshd.o:(main)

PR: 279437
Approved by: maintainer timeout
Sponsored by: Klara, Inc.