Fix example test names to comply with Go 1.24 vet checks (#1203)

## What changes are proposed in this pull request?

This PR updates the names of many `Example...` functions in
`*_usage_test.go` files across multiple service packages to comply with
stricter vet rules introduced in Go 1.24.

- **WHAT**: Renamed example functions so that their names match real
exported identifiers.
- **WHY**: In Go 1.24, the `tests` analyzer in `go vet` enforces that
example function names must map to valid exported identifiers. These
stricter checks caused previously valid tests to fail during `go test`,
even though the actual test logic remained unchanged.

## How is this tested?

Validated by running `make test` locally with Go 1.24. All example tests
now pass without build or vet errors.

NO_CHANGELOG=true

Co-authored-by: Omer Lachish <rauchy@users.noreply.github.com>

Author: rauchy