pgsql: Improve test coverage of geometric types

Improve test coverage of geometric types

This commit significantly increases test coverage of geo_ops.c, adding
tests for various issues addressed by 2e2a392de3 (which went undetected
for a long time, at least partially due to not being covered).

This also removes alternative results expecting -0 on some platforms.
Instead the functions are should return the same results everywhere,
transforming -0 to 0 if needed.

The tests are added to geometric.sql file, sorted by the left hand side
of the operators. There are many cross datatype operators, so this seems
like the best solution.

Author: Emre Hasegeli
Reviewed-by: Tomas Vondra

Discussion:
https://www.postgresql.org/message-id/CAE2gYzxF7-5djV6-cEvqQu-fNsnt%3DEqbOURx7ZDg%2BVv6ZMTWbg%40mail.gmail.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/a3d2844852dc664718320b15cbc6d6bfa264e66e

Modified Files
--------------
src/test/regress/expected/box.out          |   44 +-
src/test/regress/expected/circle.out       |   39 +-
src/test/regress/expected/create_index.out |   73 +-
src/test/regress/expected/geometry.out     | 4881 ++++++++++++++++++++++++++--
src/test/regress/expected/geometry_1.out   | 4881 ++++++++++++++++++++++++++--
src/test/regress/expected/geometry_2.out   |  563 ----
src/test/regress/expected/line.out         |  272 +-
src/test/regress/expected/lseg.out         |   24 +-
src/test/regress/expected/path.out         |   49 +-
src/test/regress/expected/point.out        |  358 +-
src/test/regress/expected/polygon.out      |  200 +-
src/test/regress/sql/box.sql               |    9 +
src/test/regress/sql/circle.sql            |   10 +-
src/test/regress/sql/geometry.sql          |  400 ++-
src/test/regress/sql/line.sql              |   79 +-
src/test/regress/sql/lseg.sql              |    9 +-
src/test/regress/sql/path.sql              |   22 +-
src/test/regress/sql/point.sql             |   10 +
src/test/regress/sql/polygon.sql           |   91 +-
19 files changed, 10088 insertions(+), 1926 deletions(-)