feat(jans-cedarling): make tokens optional for sidecar

[SafinWasi]

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Description

As per the discussion in #10408, one to three tokens may be provided to input for cedarling instead of all 3 tokens being required. This depends on whether user or workload authorization is disabled, after which cedarling will create entities to the best of its ability. The mentioned PR must be merged before this can proceed.

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Prepare

• Read contribution guidelines
• Read license information

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Identified code changes

• remove token checks

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Test cases and code coverage

N/A

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Document the changes

• adjust sidecar example