feat: use eip7732-support image for dora when eip7732 is scheduled for activation (ePBS) (ethereum#881)

uses the `eip7732-support` branch from dora:
ethpandaops/dora#227

Author: pk910

src/dora/dora_launcher.star

@@ -125,6 +125,8 @@ def get_config(
     if dora_params.image == constants.DEFAULT_DORA_IMAGE:
         if network_params.fulu_fork_epoch < constants.FULU_FORK_EPOCH:
             IMAGE_NAME = "ethpandaops/dora:fulu-support"
+        if network_params.eip7732_fork_epoch < constants.EIP7732_FORK_EPOCH:
+            IMAGE_NAME = "ethpandaops/dora:eip7732-support"
 
     return ServiceConfig(
         image=IMAGE_NAME,