feat: make sensitive log value redaction text configurable

[aarmam]

This pull request introduces feature to configure sensitive log value redaction text. Current redaction text "Value is sensitive and has been redacted. To see the value set config key "log.leak_sensitive_values = true" or environment variable "LOG_LEAK_SENSITIVE_VALUES=true"." is too long and takes considerable amount of log space.

Related issue(s)

ory/x#482

Checklist

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  introduces a new feature.
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[zepatrik]

Nice, thank you 👍