message: Set epsilon to the same values as TF keras
  Summary:
  Make sure the keras layers set the same epsilon as the non-IPU keras layers.
  Fixes T22909
  Test Plan: All tests pass
  Reviewers: #tensorflow, hakons, #framework_ip_review_-_any_oss_or_third-party_code_use_has_been_approved, jakeh
  Maniphest Tasks: T22909
diff: @@ -60,7 +60,7 @@ class GroupNorm(Layer):
  channels_axis=-1,
  center=True,
  scale=True,
  - epsilon=1e-6,
  + epsilon=1e-3,
  beta_initializer=None,
  gamma_initializer=None,
  strided_channel_grouping=True,
  @@ -202,7 +202,7 @@ class InstanceNorm(GroupNorm):
  channels_axis=-1,
  center=True,
  scale=True,
  - epsilon=1e-6,
  + epsilon=1e-3,
  beta_initializer=None,
  gamma_initializer=None,
  name=None):
  @@ -254,7 +254,7 @@ class LayerNorm(GroupNorm):
  channels_axis=-1,
  center=True,
  scale=True,
  - epsilon=1e-6,
  + epsilon=1e-3,
  beta_initializer=None,
  gamma_initializer=None,
  name=None):
  