feat(clerk-js): Support collecting optional fields in combined flow #11218

# to view logs

Job	Run time
check-permissions	2s
Formatting, linting & changeset checks	1m 47s
Integration Tests (generic, chrome)	1m 29s
Unit Tests (18)	40s
Integration Tests (express, chrome)	1m 37s
Unit Tests (22)	47s
Integration Tests (quickstart, chrome)	1m 25s
Integration Tests (ap-flows, chrome)	1m 26s
Integration Tests (elements, chrome)	1m 25s
Integration Tests (sessions, chrome)	1m 23s
Integration Tests (astro, chrome)	1m 28s
Integration Tests (expo-web, chrome)	1m 26s
Integration Tests (tanstack-start, chrome)	1m 26s
Integration Tests (tanstack-router, chrome)	1m 28s
Integration Tests (vue, chrome)	1m 31s
Integration Tests (nuxt, chrome)	1m 25s
Integration Tests (react-router, chrome)	1m 30s
Integration Tests (nextjs, chrome, 13)	5m 34s
Integration Tests (nextjs, chrome, 14)	5m 45s
Integration Tests (nextjs, chrome, 15)	5m 42s
	39m 16s

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