Add trc1log wrapped logger

[advayakrishna]

Before this PR

This change adds a wrapped logging implementation for trc1logs.

As part of this change, the trc1 logger now adds span fields using a param instead of a custom marshaller so that it can be nested at different levels in the original vs. wrapped logging implementations.

After this PR

==COMMIT_MSG==
Add trc1log wrapped logger
==COMMIT_MSG==

Possible downsides?

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Description

Add trc1log wrapped logger

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[bmoylan]

Reviewed 11 of 15 files at r1, 5 of 5 files at r2.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @advayakrishna)

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wlog/trclog/trc1log/logger_default.go, line 95 at r2 (raw file):

	fields := make(map[string]interface{})
	fields[AnnotationValueKey] = value
	fields[AnnotationTimestampKey] = timeStamp.Round(time.Microsecond).UnixNano() / 1e3

nit: divide by time.Microsecond instead of 1e3

[bmoylan]

Reviewed 1 of 1 files at r3.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @advayakrishna)