Embed time zone data from Go in promtail (#1361)

[splitt3r]

What this PR does / why we need it: This pr embeds the timezone data from Go in the Promtail binary. See the related issue for more info.

Which issue(s) this PR fixes:
Fixes #1361

Special notes for your reviewer:

Checklist

• Documentation added
• Tests updated

Links

• Thanks to https://github.com/DataDog/terraform-provider-datadog/pull/728/files which fixes the issue for antoher Go prog.

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[cyriltovena]

why did you close that ?