[BUGFIX canary] Restore/deprecate outlet `TemplateFactory` support #8029

Job	Run time
Type Checking (current version)	42s
Debug and Prebuilt (All Tests by Package + Canary Features)	3m 6s
Linting	51s
Type Checking (other supported versions) (4.9)	1m 6s
Type Checking (other supported versions) (5.0)	59s
Type Checking (other supported versions) (next)	1m 3s
Blueprint Tests	7m 40s
Smoke tests (Full Ember Apps)	1m 40s
Production (All Tests + Canary Features)	3m 14s
Browserstack Tests (Safari, Edge)	2m 24s
Production (All Tests + Canary Features with Debug Render Tree)	2m 57s
Browser Tests (Firefox)	2m 19s
Extend Prototypes	2m 2s
Node.js Tests	53s
Publish channel to s3	0s
Notify Discord	0s
Deploy tags to npm	0s
Publish alpha from default branch	0s
	30m 56s

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