Add support for InfluxDB 2.X (loader and query runner)

[JoaoNovais181]

Summary

This PR adds support for benchmarking InfluxDB 2.x using TSBS. It includes:

• tsbs_load_influx_2: Loader for InfluxDB 2.X using the v2 HTTP API with token-based authentication
• tsbs_run_queries_influx_2: Query runner using the v2 Query API, with Flux.
• influx_2 modules in tsbs_generate_queries: Supports devops and iot use cases with Flux query formats.

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New CLI Flags

For tsbs_load_influx_2:

• --token: InfluxDB 2.X API token
• --org: InfluxDB Organization

For tsbs_run_queries_influx_2:

• --token: InfluxDB 2.X API token
• --org: InfluxDB Organization

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Notes

• Currently supports Flux query language.
• All functionality modeled after existing InfluxDB 1.x implementations for consistency.
• New packages located under cmd/tsbs_load_influx_2, cmd/tsbs_run_queries_influx_2, and cmd/tsbs_generate_queries/databases/influx_2/.

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