LP#1463973: Use dollar-quoting for report literals

LP#1463973: Use dollar-quoting for report literals

When inserting string literal into SQL for Clark, we quote
apostrophes with a backslash.  That worked fine until Postgres
changed its default for the standard_conforming_strings GUC to "on"
after which it no longer worked fine.

So, we will now use "dollar quoting" for string literals instead
in much the same way we do for our search queries.

Test plan
---------

Pre-patch: Try to run a report where a string value is required as
a filter parameter, and include an apostrophe in that string.  The
report will fail with an SQL error.

Post-patch: Do the same, it will not fail.

Signed-off-by: Mike Rylander <mrylander@gmail.com>