Move BigQuery classes [VS-971]

[mcovarr]

Move BigQuery classes that are only used by GVS into a gvs package. This should facilitate the alignment of GVS with GATK master by making it clear that these classes were created specifically for GVS and are not necessarily more generally usable in their current forms.

[koncheto-broad]

LGTM. Appear to just be moving packages and a bit of formatting.

[gbggrant]

Looks good to me.

[codecov]

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Additional details and impacted files

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[droazen]

@mcovarr Does the GVS traversal artifact destined to remain in GATK depend on the BigQueryUtils? I'm guessing that it does? Is the intention that BigQueryUtils would remain in gatk/master, then, just in a different package?

[mcovarr]

@droazen exactly, the artifact will depend on BigQueryUtils which would be in a gvs package to hopefully make clear that the contents are currently fairly specific to GVS and probably not ideal for more general use in their present form.

[gatk-bot]

Github actions tests reported job failures from actions build 5405305229
Failures in the following jobs:

Test Type	JDK	Job ID	Logs
conda	8	5405305229.3	logs