fix telegraf config related fixes

[ganga1980]

This pull request primarily focuses on refactoring and improving the codebase of the tomlparser-prom-customconfig.rb and tomlparser-osm-config.rb scripts in the build directory. The changes include the introduction of a new helper function is_windows?, the replacement of direct checks for the Windows OS with this new function, and the adjustment of timeout configuration keys based on the OS. Additionally, there are changes to the ama-logs.yaml file in the kubernetes directory.

Here are the key changes:

Refactoring and code improvements:

• build/common/installer/scripts/tomlparser-prom-customconfig.rb: Introduced a new helper function is_windows? to check if the operating system is Windows, which improves code readability and maintainability.
• build/common/installer/scripts/tomlparser-prom-customconfig.rb: Replaced direct checks for the Windows OS with the new is_windows? function in multiple places. This makes the code cleaner and easier to understand. [1] [2] [3]

Configuration adjustments:

• build/common/installer/scripts/tomlparser-prom-customconfig.rb: Adjusted the timeout configuration key based on the OS in the createPrometheusPluginsWithNamespaceSetting function. For Windows, the key is "response_timeout", while for other OS, it's "timeout". This change ensures proper configuration for different OS. [1] [2]
• build/linux/installer/scripts/tomlparser-osm-config.rb: Changed the timeout configuration key from "response_timeout" to "timeout" in the replaceOsmTelegrafConfigPlaceHolders function.

Configuration file changes:

• kubernetes/ama-logs.yaml: Removed the HOSTNAME environment variable from the specification. The reason for this change since this duplicate.