add --enable-high-validator-count-metrics

[dknopik]

add CLI flag to specify if we should enable per validator metrics if we have a high validator count

[Copilot]

Pull Request Overview

This PR adds a new CLI flag (--enable-high-validator-count-metrics) which enables per validator metrics for high validator counts.

• In lib.rs, the code now leverages the new flag in the client builder.
• In config.rs, a configuration field is added with a default value to control this feature.
• In cli.rs, the new flag is defined using clap with appropriate help text and display options.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
anchor/client/src/lib.rs	Uncomments the enable_high_validator_count_metrics configuration in the client builder.
anchor/client/src/config.rs	Adds the enable_high_validator_count_metrics field to the Config struct and initializes it.
anchor/client/src/cli.rs	Introduces the --enable-high-validator-count-metrics flag via clap with detailed help text.

[diegomrsantos]

Thanks a lot for handling this!