pgsql: pgrowlocks: change lock mode output labels for consistency

pgrowlocks: change lock mode output labels for consistency

Change "Share" to "For Share" and "Key Share" to "For Key Share" for
consistency with other lock mode labels.

BACKWARD COMPATIBILITY BREAK

Reported-by: David Cook

Discussion: /messages/by-id/CA+dNBPNBf+FCEwohe7SH1tSks0R_G4F=tuvM=hnPs4qWiAH8vg@mail.gmail.com

Backpatch-through: master

Branch
------
master

Details
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https://git.postgresql.org/pg/commitdiff/15d5d7405d3591aeba418b20c5ac75e80ddc8c74

Modified Files
--------------
contrib/pgrowlocks/expected/pgrowlocks.out | 40 +++++++++++++++---------------
contrib/pgrowlocks/pgrowlocks.c | 4 +--
doc/src/sgml/pgrowlocks.sgml | 2 +-
3 files changed, 23 insertions(+), 23 deletions(-)