chore: add new argument to invoke() and RequiresClientAuthorization() (#2000)

## Description

Tool `invoke()` and `RequiresClientAuthorization()` takes a new input
argument -- Resource Manager. Resource manager will be used to retrieve
Source in the next step.

In order to achieve the goal, this PR implements the follows:
* move resource manager from the server package to a new package to
prevent import cycles (between server and mcp)
* added a new interface in `tools.go` to prevent import cycle (between
resources and tools package)
* add new input argument in all tools

## PR Checklist

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- [x] Make sure you reviewed

[CONTRIBUTING.md](https://github.com/googleapis/genai-toolbox/blob/main/CONTRIBUTING.md)
- [x] Make sure to open an issue as a

[bug/issue](https://github.com/googleapis/genai-toolbox/issues/new/choose)
  before writing your code! That way we can discuss the change, evaluate
  designs, and agree on the general idea
- [x] Ensure the tests and linter pass
- [x] Code coverage does not decrease (if any source code was changed)
- [x] Appropriate docs were updated (if necessary)
- [x] Make sure to add `!` if this involve a breaking change

internal/tools/cloudsql/cloudsqlwaitforoperation/cloudsqlwaitforoperation.go

@@ -209,7 +209,7 @@ func (t Tool) ToConfig() tools.ToolConfig {
 }
 
 // Invoke executes the tool's logic.
-func (t Tool) Invoke(ctx context.Context, params parameters.ParamValues, accessToken tools.AccessToken) (any, error) {
+func (t Tool) Invoke(ctx context.Context, resourceMgr tools.SourceProvider, params parameters.ParamValues, accessToken tools.AccessToken) (any, error) {
 	paramsMap := params.AsMap()
 
 	project, ok := paramsMap["project"].(string)
@@ -305,7 +305,7 @@ func (t Tool) Authorized(verifiedAuthServices []string) bool {
 	return true
 }
 
-func (t Tool) RequiresClientAuthorization() bool {
+func (t Tool) RequiresClientAuthorization(resourceMgr tools.SourceProvider) bool {
 	return t.Source.UseClientAuthorization()
 }