RCORE-2187 Prefix sync connection log messages with co_id when possible

[jbreams]

What, How & Why?

This updates the logger used by sync Connections/Sessions to be prefixed with the app services co_id rather than the numeric conn ident counter when available. This lets us more easily correlate client logs to server logs. If the co_id is not available the behavior should be unchanged.

☑️ ToDos

• 📝 Changelog update
• 🚦 Tests (or not relevant)
• C-API, if public C++ API changed
• bindgen/spec.yml, if public C++ API changed

[coveralls-official]

Pull Request Test Coverage Report for Build jonathan.reams_3347

Details

• 48 of 48 (100.0%) changed or added relevant lines in 4 files are covered.
• 212 unchanged lines in 16 files lost coverage.
• Overall coverage decreased (-0.003%) to 90.955%

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Files with Coverage Reduction	New Missed Lines	%
test/fuzz_tester.hpp	1	57.73%
test/test_index_string.cpp	1	93.48%
test/test_util_network_ssl.cpp	1	89.59%
test/util/crypt_key.cpp	1	75.0%
src/realm/sync/noinst/client_impl_base.cpp	2	82.33%
test/object-store/util/test_file.cpp	2	86.29%
test/test_lang_bind_helper.cpp	2	93.2%
src/realm/sync/noinst/protocol_codec.hpp	3	73.54%
src/realm/sync/noinst/server/server.cpp	5	73.41%
test/test_sync.cpp	5	92.9%

Totals
Change from base Build 2443:	-0.003%
Covered Lines:	214712
Relevant Lines:	236064

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💛 - Coveralls