clean up test_rls_hooks module

Over at [1] Mark Dilger got led astray because he used
src/test/modules/test_rls_hooks as a template for his new test module.
It looks like that module was created with some over eager copying of
another test module, but it has a couple of things wrong with it.

. it isn't an extension, so the Makefile shouldn't have an EXTENSION
entry, and there shouldn't be a .control file

. it doesn't need to be preloaded so there is no requirement for a
special config, nor for corresponding REGRESS_OPTS and NO_INSTALLCHECK
lines in the Makefile.

Here's a patch to fix those things.


cheers


andrew


[1]
https://postgr.es/m/47F87A0E-C0E5-43A6-89F6-D403F2B45175@enterprisedb.com

--
Andrew Dunstan
EDB: https://www.enterprisedb.com