feat: pectra compatibility (#1155)

**Motivation:**

Updates the EigenPod proof system to be pectra compatible. This includes
updating container heights and support 0x02 withdrawal credentials. All
other Pectra updates will be addressed in a post-slashing upgrade.

**Modifications:**

- Functionality:
#1053
- Upgrade Script:
#1067

**Result:**

`v1.4.0`. _Note: The commits for the the `v1.4.0` deployment are
cherry-picked onto `v1.1.1` for testnet due to audit fixes not being
deployed yet. See:
#1156 for the
diff`

Author: ypatil12