chore(deps): update dependency ember-load-initializers to v3 #3562

Job	Run time
Lint Addon	25s
Lint Test App	30s
Tests (Floating Dependencies)	1m 10s
embroider-optimized - Allowed to fail	57s
Tests (ember-4.0, false)	56s
ember-beta - Allowed to fail	1m 3s
Tests (ember-lts-4.4, false)	54s
ember-canary - Allowed to fail	1m 28s
Tests (ember-lts-4.8, false)	51s
Tests (ember-4.12, false)	1m 3s
Tests (ember-lts-5.8, false)	56s
Tests (ember-default, false)	52s
Tests (ember-release, false)	1m 10s
Tests (embroider-safe, false)	52s
	13m 7s

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