feat: add MFA (Phone) related config

[J0]

What kind of change does this PR introduce?

Introduces the supporting Auth configuration for MFA (Phone). This include:

1. The respective enable / disable flows for each toggle MFA.Phone.EnrollEnabled and MFA.Phone.VerifyEnabled
2. MFA.MaxEnrolledFactors which is already exposed on the platform
3. Phone also comes with a configurable OTP Length as well as Template. We don't include the provider specific configuration as they are derived from the primary provider. We also expose MaxFrequency

[coveralls]

Pull Request Test Coverage Report for Build 10363863786

Details

• 6 of 13 (46.15%) changed or added relevant lines in 1 file are covered.
• 8 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.07%) to 60.053%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
internal/start/start.go	6	13	46.15%

Files with Coverage Reduction	New Missed Lines	%
internal/debug/postgres.go	3	64.86%
internal/gen/keys/keys.go	5	12.9%

Totals
Change from base Build 10355148573:	-0.07%
Covered Lines:	6341
Relevant Lines:	10559

---

💛 - Coveralls

[hf]

Seems fine.

[J0]

How this was tested:

Place this set of entries in the config.toml

[auth.mfa.totp]
enroll_enabled = true
verify_enabled = true

[auth.mfa]
max_enrolled_factors = 20

[auth.mfa.phone]
enroll_enabled = true
verify_enabled = true
otp_length = 6
template = "Your Code is {{ .Code }}"
max_frequency = "10s"

Run docker inspect on the Auth container and check that the Auth config is appropriately set.

Seeking early review, will only take / merge this PR once we have upgraded the Auth version on all projects across the board.

[J0]

Deploy has completed