Allow custom query in DeleteExecutionsParams

[jiechenz]

What changed?

Added a Query field to deleteexecutions.DeleteExecutionsParams and propagated it through DeleteExecutionsWorkflow into both GetNextPageTokenActivity and DeleteExecutionsActivity.

The activities now pass params.Query through sadefs.QueryWithAnyNamespaceDivision(...) when listing workflow executions, so delete-executions can target a filtered subset instead of always scanning the full namespace.

Why?

Allow a custom query to specifically select a subset of workflows to delete.

How did you test it?

• built
• run locally and tested manually
• covered by existing tests
• added new unit test(s)
• added new functional test(s)

Ran:

go test -tags test_dep ./service/worker/deletenamespace/...

Potential risks

The main risk is callers passing an overly broad or malformed query. Existing visibility listing errors will fail the workflow, and empty query behavior remains equivalent to the previous full-namespace deletion path via QueryWithAnyNamespaceDivision("").