Add a benchmark for the parser.
Add a benchmark for the parser.

This will be useful for validating changes to shared compiler passes

GITHUB_BREAKING_CHANGES=none

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=223230158

google/closure-templates,google/closure-templates,google/closure-templates,yext/closure-templates,google/closure-templates,yext/closure-templates,yext/closure-templates,google/closure-templates,yext/closure-templates