soc: nordic: enable west commands for nRF54L20 Enga cpuflpr

Enabled west flash and west erase for nRF54L20 PDK FLPR core.
Added missing reset qualifier for nRF54L20 and nRF54L09.

Signed-off-by: Michał Stasiak <michal.stasiak@nordicsemi.no>

Author: mstasiaknordic

soc/nordic/soc.yml

@@ -119,6 +119,7 @@ runners:
               - nrf54l15/cpuflpr
           - qualifiers:
               - nrf54l20/cpuapp
+              - nrf54l20/cpuflpr
           - qualifiers:
               - nrf54h20/cpuapp
               - nrf54h20/cpurad
@@ -181,6 +182,7 @@ runners:
               - nrf54l15/cpuflpr
           - qualifiers:
               - nrf54l20/cpuapp
+              - nrf54l20/cpuflpr
           - qualifiers:
               - nrf54h20/cpuapp
               - nrf54h20/cpurad
@@ -233,12 +235,17 @@ runners:
           - qualifiers:
               - nrf54l05/cpuapp
               - nrf54l05/cpuflpr
+          - qualifiers:
+              - nrf54l09/cpuapp
           - qualifiers:
               - nrf54l10/cpuapp
               - nrf54l10/cpuflpr
           - qualifiers:
               - nrf54l15/cpuapp
               - nrf54l15/cpuflpr
+          - qualifiers:
+              - nrf54l20/cpuapp
+              - nrf54l20/cpuflpr
           - qualifiers:
               - nrf54h20/cpuapp
               - nrf54h20/cpurad