Add ability to get path to modified collections in object notifications

[jedelbo]

What, How & Why?

Fixes #7320
You can get path infomation from object notifications only.

☑️ ToDos

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

[jedelbo]

@rorbech you may want to try this out

[coveralls-official]

Pull Request Test Coverage Report for Build jorgen.edelbo_138

Details

• 118 of 163 (72.39%) changed or added relevant lines in 16 files are covered.
• 765 unchanged lines in 41 files lost coverage.
• Overall coverage decreased (-0.3%) to 91.77%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/realm/collection.hpp	0	1	0.0%
src/realm/obj.hpp	0	3	0.0%
src/realm/object-store/c_api/notifications.cpp	22	33	66.67%
src/realm/dictionary.cpp	7	19	36.84%
src/realm/list.cpp	0	18	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/realm/object-store/impl/list_notifier.cpp	1	99.0%
src/realm/table_ref.hpp	1	55.81%
test/object-store/audit.cpp	1	99.93%
test/object-store/object.cpp	1	98.85%
src/realm/array_blobs_big.cpp	2	98.72%
src/realm/object-store/sync/sync_session.cpp	2	93.65%
src/realm/query_expression.hpp	2	93.68%
src/realm/sync/network/http.hpp	2	82.41%
src/realm/sync/noinst/server/server_history.cpp	2	67.94%
src/realm/uuid.cpp	2	97.01%

Totals
Change from base Build 2130:	-0.3%
Covered Lines:	242808
Relevant Lines:	264584

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💛 - Coveralls