chore(deps): update dependency ember-source to v6 #3534

Job	Run time
Lint Addon	26s
Tests (ember-4.0, false)	1m 1s
Tests (Floating Dependencies)	1m 3s
Tests (ember-lts-4.4, false)	47s
embroider-optimized - Allowed to fail	1m 11s
Tests (ember-lts-4.8, false)	1m 2s
Lint Test App	29s
ember-beta - Allowed to fail	1m 17s
Tests (ember-4.12, false)	59s
Tests (ember-lts-5.8, false)	50s
ember-canary - Allowed to fail	1m 5s
Tests (ember-default, false)	49s
Tests (ember-release, false)	53s
Tests (embroider-safe, false)	56s
	12m 48s

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