feat: bind trigger information to all logs

[azizsonawalla]

• Rewrites GCFLogger as a class with an internal Pino logger that can be reset
• Exposes new methods to add/get/reset logger bindings
• Binds trigger information to logger on every call to GCFBootstrapper.gcf()()

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[chingor13]

We can probably move this up to reset the bindings as soon as possible.

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