Implement search monitors tool

[ohltyler]

Description

Adds a search monitors tool. Utilizes the added getMonitor() & searchMonitors() fns exposed by the alerting interface in common utils. These were refactored from the alerting plugin -> common utils plugin. See related PRs for details:
opensearch-project/common-utils#566
opensearch-project/alerting#1305

Based on the passed parameters, the tool will execute either the get monitor transport action, or search monitors transport action. The get monitor action is straightforward, and just takes in a monitor ID. The search monitors action takes in DSL to query the system index containing the monitor info. The tool handles the query generation logic to prevent the agent from generating it, which would likely be error prone and need advanced prompt engineering. Various params (all optional) are available to pass to the tool's run() function to generate a query (see here for an example generated query).

The amount of parameters and/or the default values may be changed later on depending on agent performance and accuracy. For example, too much parameter tuning may lead to messy or invalid results.

Additionally, further integration testing will need to be done to validate different alerting-related questions input to the agent that will have this tool associated to it.

Issues Resolved

Closes #1545

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff

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[ohltyler]

Dependent on #1748 merging first - keeping draft until that's done.

[ohltyler]

Closing in favor of opensearch-project/skills#66