Add Variant derive macro for enums #4387

Job	Run time
Code Style	47s
Get minimum supported rust version	13s
Lint	29s
SDK docs - mgmt	23s
SDK docs	56s
SDK docs - svc	23s
SDK Tests (stable, false)	1m 48s
WASM Tests (stable, false)	48s
SDK Tests (1.76, false)	1m 55s
E2E Tests (stable, false)	38s
WASM Tests (1.76, false)	55s
SDK Tests (nightly, true)	1m 13s
E2E Tests (1.76, false)	42s
WASM Tests (nightly, true)	56s
E2E Tests (nightly, true)	50s
	12m 56s

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