[Support][BLAKE3] Prefix more blake3 methods (#149007)
Added by #147948, blake3_xof_many and blake3_compress_subtree_wide cause
conflicts when linking llvm and blake3 statically into the same binary.
Similar to #148607.
(cherry picked from commit 60579ec3059b2b6cc9dad90eaac1ed363fc395a7)
