1.1.5 merge spec tests (#2781)

* Fix arbitrary check kintsugi

* Add merge chain spec fields, and a function to determine which constant to use based on the state variant

* increment spec test version

* Remove `Transaction` enum wrapper

* Remove Transaction new-type

* Remove gas validations

* Add `--terminal-block-hash-epoch-override` flag

* Increment spec tests version to 1.1.5

* Remove extraneous gossip verification https://github.com/ethereum/consensus-specs/pull/2687

* - Remove unused Error variants
- Require both "terminal-block-hash-epoch-override" and "terminal-block-hash-override" when either flag is used

* - Remove a couple more unused Error variants

Co-authored-by: Paul Hauner <paul@paulhauner.com>

consensus/state_processing/src/per_block_processing/errors.rs

@@ -61,30 +61,10 @@ pub enum BlockProcessingError {
         expected: Hash256,
         found: Hash256,
     },
-    ExecutionBlockNumberIncontiguous {
-        expected: u64,
-        found: u64,
-    },
     ExecutionRandaoMismatch {
         expected: Hash256,
         found: Hash256,
     },
-    ExecutionInvalidGasLimit {
-        used: u64,
-        limit: u64,
-    },
-    ExecutionInvalidGasLimitIncrease {
-        limit: u64,
-        parent_limit: u64,
-    },
-    ExecutionInvalidGasLimitDecrease {
-        limit: u64,
-        parent_limit: u64,
-    },
-    ExecutionInvalidGasLimitTooSmall {
-        limit: u64,
-        min: u64,
-    },
     ExecutionInvalidTimestamp {
         expected: u64,
         found: u64,