[feature] #4350: Expose event set bitfields in schema

[DCNick3]

Description

Add a new kind of schema metadata - BitmapMeta - and use it to expose *EventSet bitfields in schema

Linked issue

Closes #4350

Checklist

• make ci pass

[coveralls]

Pull Request Test Coverage Report for Build 8433022413

Details

• 37 of 52 (71.15%) changed or added relevant lines in 3 files are covered.
• 5030 unchanged lines in 91 files lost coverage.
• Overall coverage increased (+0.8%) to 57.63%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
schema/src/lib.rs	0	2	0.0%
schema/src/serialize.rs	2	15	13.33%

Files with Coverage Reduction	New Missed Lines	%
primitives/src/conststr.rs	1	91.14%
ffi/derive/src/convert.rs	1	84.45%
primitives/src/lib.rs	1	0.0%
core/src/sumeragi/network_topology.rs	1	98.78%
crypto/src/signature/bls/mod.rs	2	0.0%
config/src/snapshot.rs	3	78.57%
data_model/derive/src/has_origin.rs	3	95.16%
config/src/kura.rs	3	80.0%
primitives/src/addr.rs	3	64.04%
config/src/logger.rs	5	72.73%

Totals
Change from base Build 7884695009:	0.8%
Covered Lines:	23136
Relevant Lines:	40146

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💛 - Coveralls