fix: Reduce high cardinality in ProvMnS API client metrics
- Add ClientRequestMetricsTagCustomizer to template FDN values in URI metrics
- Apply custom metrics handler to DMI WebClients
- Template URI from /ProvMnS/v1/SubNetwork=A/ManagedElement=E to /ProvMnS/v1/{fdn}
- Preserve query parameters as templates for operational visibility
- Fix existing tests to handle new WebClient configuration dependencies
Issue-ID: CPS-3067
Change-Id: I98b972a9d84f6e6710e82ae73bc5499771c3a340
Signed-off-by: emaclee <lee.anjella.macabuhay@est.tech>