feat: add secure password change config

[silentworks]

What kind of change does this PR introduce?

This feature can be found in the Supabase Hosted Dashboard but doesn't have a way to configure it in the config.toml.

What is the current behavior?

No way to set Secure password change

What is the new behavior?

Can now set Secure password change in the config.toml file.

Additional context

Add any other context or screenshots.

[coveralls]

Pull Request Test Coverage Report for Build 10627700876

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 8 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.05%) to 59.994%

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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 10530811862:	-0.05%
Covered Lines:	6360
Relevant Lines:	10601

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💛 - Coveralls

[J0]

Probably don't need a test in config_test.go for this one since it should load similarly to the other auth config variables

[sweatybridge]

Thanks for patching and reviewing!