Refactor product inheritance for raven products

Add an additional layer of inheritance for `aosp_raven`,
`aosp_raven_64`, `aosp_raven_pkvm`, `aosp_raven_pgagnostic_64`,
`aosp_raven_hwasan`, and `aosp_raven_61`.

This change adds a common layer of inheritance for non-factory
products (raven_generic.mk). This makes it easier to configure
factory and non-factory products differently.

Non-factory `raven` products now inherits from
`device/google/raviole/raven_generic.mk` which inherit from
`device/google/raviole/device-raven.mk`.

aconfig flags: Flag: EXEMPT mechanical refactoring
build flags: Flag: EXEMPT mechanical refactoring

Bug: 338005353
Test: lunch aosp_raven-trunk_staging-userdebug && m
      lunch aosp_raven_64-trunk_staging-userdebug && m
      lunch aosp_raven_pkvm-trunk_staging-userdebug && m
      lunch aosp_raven_pgagnostic_64-trunk_staging-userdebug && m
      lunch aosp_raven_hwasan-trunk_staging-userdebug && m
      lunch aosp_raven_61-trunk_staging-userdebug && m
Change-Id: Id5faed5a4be4c6480ee64654203d7f7e840c5c23
diff --git a/aosp_raven.mk b/aosp_raven.mk
index 6a29283..f434886 100644
--- a/aosp_raven.mk
+++ b/aosp_raven.mk
@@ -15,7 +15,7 @@
 #
 
 $(call inherit-product, device/google/gs101/aosp_common.mk)
-$(call inherit-product, device/google/raviole/device-raven.mk)
+$(call inherit-product, device/google/raviole/raven_generic.mk)
 
 PRODUCT_NAME := aosp_raven
 PRODUCT_NAME_FOR_ATTESTATION := raven