feat(auth): Add support for Email OTP MFA (#5449) #2959

Job	Run time
test / test-dart-vm (3.3.0)	1m 39s
test / test-dart-vm (stable)	1m 33s
dart2js_test / test-dart-2js (3.3.0, chrome)	2m 4s
ddc_test / test-dart-ddc (3.3.0, chrome)	2m 4s
native_test / test-dart-native (macos-14)	1m 1s
dart2js_test / test-dart-2js (3.3.0, firefox)	2m 10s
ddc_test / test-dart-ddc (3.3.0, firefox)	2m 16s
native_test / test-dart-native (windows-latest)	4m 14s
dart2js_test / test-dart-2js (stable, chrome)	1m 59s
ddc_test / test-dart-ddc (stable, chrome)	1m 58s
dart2js_test / test-dart-2js (stable, firefox)	2m 0s
ddc_test / test-dart-ddc (stable, firefox)	2m 4s
	25m 2s

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