auth: meson: fix missing symbols for {bind,gsqlite3}backend.so

[zeha]

Short description

When building these dynamically, they need more bits linked. Specifically bindbackend needs the bindparser, and all gsql*backends need gsqlbackend. For gsqlite3backend the situation is more complicated, as the main programs also need ssqlite3.

I've tested the patch against 5.2.0 in a Debian build.

My testing was only the Debian build-time smoke tests for bindbackend, lmdbbackend, gsqlite3backend. Haven't tried the other gsql*backends.

Addresses parts of #13987.

Checklist

I have:

• read the CONTRIBUTING.md document
• read and accepted the Developer Certificate of Origin document, including the AI Policy, and added a "Signed-off-by" to my commits
• compiled this code
• tested this code
• included documentation (including possible behaviour changes)
• documented the code
• added or modified regression test(s)
• added or modified unit test(s)

[coveralls]

Pull Request Test Coverage Report for Build 20764046660

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 9232 unchanged lines in 120 files lost coverage.
• Overall coverage decreased (-5.4%) to 67.976%

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Files with Coverage Reduction	New Missed Lines	%
pdns/base64.cc	1	80.6%
pdns/lua-base4.hh	1	0.0%
pdns/recursordist/rec-rust-lib/rust/src/bridge.hh	1	0.0%
pdns/recursordist/sortlist.hh	1	75.0%
pdns/resolver.hh	1	0.0%
pdns/dnstap.cc	2	70.71%
pdns/json.hh	2	0.0%
pdns/recursordist/secpoll-recursor.cc	2	51.69%
pdns/tsigverifier.hh	2	0.0%
pdns/dnsname.hh	3	89.74%

Totals
Change from base Build 20756179712:	-5.4%
Covered Lines:	95261
Relevant Lines:	129504

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💛 - Coveralls

Clearly not working in CI even though it's working on my test env