fix: rest client timeout is not set as per template

[rahulguptajss]

No description provided.

[Copilot]

Pull request overview

This PR fixes REST client timeout handling so that client_timeout values defined in templates/config actually update the underlying http.Client timeout used for REST requests.

Changes:

• Remove the exported Timeout field from cmd/tools/rest.Client and rely on the underlying http.Client.Timeout.
• Add SetTimeout(time.Duration) / GetTimeout() time.Duration helpers to manage/read the effective timeout.
• Update REST-based collectors to use the new accessors for logging and for applying client_timeout from config.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
cmd/tools/rest/client.go	Removes Client.Timeout, sets timeout on http.Client, adds SetTimeout/GetTimeout.
cmd/collectors/statperf/statperf.go	Switches timeout logging to Client.GetTimeout().
cmd/collectors/restperf/restperf.go	Switches timeout logging to Client.GetTimeout().
cmd/collectors/rest/rest.go	Applies template/config client_timeout via Client.SetTimeout(); updates logging and ASUP output.
cmd/collectors/keyperf/keyperf.go	Switches timeout logging to Client.GetTimeout().

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