pgsql: Fix copy/out/readfuncs for accessMethod addition in 8586bf7ed8.

Fix copy/out/readfuncs for accessMethod addition in 8586bf7ed8.

This includes a catversion bump, as IntoClause is theoretically
speaking part of storable rules. In practice I don't think that can
happen, but there's no reason to be stingy here.

Per buildfarm member calliphoridae.

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/b1723423216749be9b28f8430c3b7180dec3fa70

Modified Files
--------------
src/backend/nodes/copyfuncs.c    | 1 +
src/backend/nodes/outfuncs.c     | 2 ++
src/backend/nodes/readfuncs.c    | 1 +
src/include/catalog/catversion.h | 2 +-
4 files changed, 5 insertions(+), 1 deletion(-)