chore: extract release-it config to own file #1005

Job	Run time
Floating Dependencies	50s
Tests	46s
ember-try: ember-lts-3.28	53s
Type checking - [email protected]	51s
ember-try: ember-lts-4.4	53s
Type checking - [email protected]	48s
ember-try: ember-lts-4.8	55s
Type checking - [email protected]	47s
ember-try: ember-lts-4.12	1m 0s
Type checking - typescript@next	53s
ember-try: ember-release	53s
ember-try: ember-beta	54s
ember-try: ember-canary	54s
ember-try: ember-classic	57s
ember-try: embroider-safe	58s
ember-try: embroider-optimized	1m 1s
	14m 13s

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