TCS: http metrics

[lenkis]

Related dev. resources:

• Release card for TCS 1.0.2: https://jira.vk.team/browse/PRODUCTS-2805
• Dev ticket: https://jira.vk.team/browse/TNTP-4945

Product: TCS
Since: 1.1
Audience/target: admins, end users (finops)
Root document: https://www.tarantool.io/ru/column-store/doc/1.x/
SME: @ Galiev-Ruslan

Details

Add/update definitions for:

• tcs_storage_requests_total
• tcs_storage_latency
• tcs_storage_inserts_total