feat(core): hasSlotted SSR hints #10356

Job	Run time
SSR Tests (Playwright)	1m 38s
Unit Tests (Web Test Runner)	1m 5s
Verify that build runs on Windows	2m 14s
Lint files	31s
Compile project (20)	59s
Compile project (21)	59s
Validate successful build on main	5s
Publish Playwright Report	21s
	7m 52s

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