Allow to configure SAML auth acceptedClockSkewMs

[stephane-mori]

SAML authentication can be configure in app-config.yaml file. Some options are available such as entryPoint, issuer or other.
acceptedClockSkewMs option is not available.

Feature Suggestion

Allow to configure SAML auth acceptedClockSkewMs

Possible Implementation

I already tried an implementation.

in plugins/auth-backend/config.d.ts b/plugins/auth-backend/config.d.ts
add acceptedClockSkewMs: number; to Config interface

in plugins/auth-backend/src/providers/saml/provider.ts b/plugins/auth-backend/src/providers/saml/provider.ts
add acceptedClockSkewMs: config.getOptionalNumber('acceptedClockSkewMs'), to SAML authentication provider options

Context

I can start to work on it.