pgsql: Move queryjumble.c code to src/backend/nodes/

Move queryjumble.c code to src/backend/nodes/

This will ease a follow-up move that will generate automatically this
code. The C file is renamed, for consistency with the node-related
files whose code are generated by gen_node_support.pl:
- queryjumble.c -> queryjumblefuncs.c
- utils/queryjumble.h -> nodes/queryjumble.h

Per a suggestion from Peter Eisentraut.

Reviewed-by: Peter Eisentraut
Discussion: https://postgr.es/m/Y5BHOUhX3zTH/ig6(at)paquier(dot)xyz

Branch
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master

Details
-------
https://git.postgresql.org/pg/commitdiff/8eba3e3f020843a7641121e778e161b58ec2e490

Modified Files
--------------
contrib/pg_stat_statements/pg_stat_statements.c | 2 +-
src/backend/nodes/Makefile | 1 +
src/backend/nodes/meson.build | 1 +
src/backend/{utils/misc/queryjumble.c => nodes/queryjumblefuncs.c} | 6 +++---
src/backend/parser/analyze.c | 2 +-
src/backend/postmaster/postmaster.c | 2 +-
src/backend/utils/misc/Makefile | 1 -
src/backend/utils/misc/guc_tables.c | 2 +-
src/backend/utils/misc/meson.build | 1 -
src/include/{utils => nodes}/queryjumble.h | 2 +-
src/include/parser/analyze.h | 2 +-
11 files changed, 11 insertions(+), 11 deletions(-)