Configure auth strategies from SecretsManager and SSM ParameterStore for each AuthStrategy

[pflorek]

The current implementation offers the ability to fully configure the GitHub AuthStrategies either by SecretsManager or SSM ParameterStore for GitHub App (with installationId), a PAT or unauthenticated

https://github.com/octokit/authentication-strategies.js/#authentication-strategiesjs

See also https://github.com/pepperize/cdk-github/blob/main/API.md#static-functions--1

auth strategy	description
appAuth	GitHub App or installation authentication.
tokenAuth	Personal Access Token authentication.
unauthenticated	unauthenticated.

Do we have to support additional AuthStrategies. Or by different AWS Service i.e. AuthOptions.tokenAuthFromSecret(secret: ISecret), AuthOptions.tokenAuthFromParameter(parameter: IParameter)