[BUGFIX stable] Fix types for Resolver contract #7315

Job	Run time
Type Checking (current version)	1m 24s
Debug and Prebuilt (All Tests by Package + Canary Features)	4m 33s
Linting	1m 14s
Blueprint Tests	6m 8s
Type Checking (other supported versions) (4.9)	1m 30s
Type Checking (other supported versions) (5.0)	1m 45s
Type Checking (other supported versions) (next)	2m 0s
Production (All Tests + Canary Features)	5m 25s
Smoke tests (Full Ember Apps)	2m 57s
Production (All Tests + Canary Features with Debug Render Tree)	5m 46s
Browserstack Tests (Safari, Edge)	2m 48s
Browser Tests (Firefox)	3m 16s
Node.js Tests	1m 22s
Extend Prototypes	4m 40s
Notify Discord	0s
Publish alpha from default branch	0s
Deploy tags to npm	0s
Publish channel to s3	0s
	44m 48s

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