biology/diamond: Update to 2.2.5 and fix deepclust crash

Initialize the seed_only member in the Hsp constructor that takes an
ApproxHsp. deepclust builds Hsps through this constructor for its
approximate alignments, so seed_only was left uninitialized. When it
evaluated to true, the SEED_ONLY flag was set on an otherwise
full-length intermediate output record. The multiblock join later
parsed that record as seed-only, stopped four bytes short, and aborted
with "Unexpected end of file", failing the deepclust-multiblock
regression test.

On Linux, the uninitialized member consistently evaluated to false,
masking the bug. On FreeBSD, it evaluated to true, and triggered the
crash.

Release notes: https://github.com/bbuchfink/diamond/releases/tag/v2.2.5
Sponsored by: The FreeBSD Foundation