Add NDTWeb100 struct to mirror current BQ schema

[stephen-soltesz]

This change adds a new Go struct that mirrors the current ndt web100 schema.

Notable differences:

• Deltas reuses the web100Snap structure, which includes LocalAddress, RemAddress, and related fields that are not found in the current schema. This difference simplifies the structure without duplicating all other fields.
• Adding api.ASData to the client and server network information to mirror annotation-service values.
• Adding api.GeolocationIP for the client and server geolocation to mirror annotation-service values.
• Server geolocation does not include "Machine" and "Site" fields used in the uuid-annotator.

I accidentally updated part of the mlab-sandbox.base_tables.ndt table during testing of update-schema so the extra columns noted above are already present in the sandbox tables.

To compare this and production schemas:

$ bq show --format=prettyjson mlab-sandbox:base_tables.ndt | jq .schema.fields > new.schema
$ bq show --format=prettyjson mlab-oti:base_tables.ndt | jq .schema.fields > orig.schema
$ diff -Ndur <( sort orig.schema ) <( sort new.schema ) | less

Testing: manual update of sandbox schemas using new update-schema command. Since this is a mirror struct, it does not impact parser behavior.

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This change is 

[coveralls]

Pull Request Test Coverage Report for Build 6435

• 0 of 7 (0.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.04%) to 62.451%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
schema/ndt_web100.go	0	7	0.0%
<!--	Total:	0	7	0.0%	-->

Totals
Change from base Build 6411:	-0.04%
Covered Lines:	3471
Relevant Lines:	5558

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💛 - Coveralls

[stephen-soltesz]

@gfr10598 PTAL?

[gfr10598]

Better diff bq show --format=prettyjson mlab-sandbox:base_tables.ndt | jq -c .schema.fields | sed "s/},/},\n/g" > new.schema bq show --format=prettyjson mlab-oti:base_tables.ndt | jq -c .schema.fields | sed "s/},/},\n/g" > orig.schema diff -Ndur <( sort orig.schema ) <( sort new.schema ) | less