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.