Automatically Generate spillings.toml

[DavePearce]

The corset tool has been updated to generate toml output for spilling information. Thus, it could in principle be used to automatically populate the spilling.toml file. This issue is to manage the integration. Currently, the output looks like this:

> corset debug -s --toml zkevm.bin
# Automatically generated via `corset debug -s --toml`
[spillings]
    SHF_RT =    0
   ROM_LEX =    1
       BIN =   15
       MMU =   10
  TXN_DATA =    7
   EC_DATA =   11
INSTRUCTION_DECODER =    0
       SHF =   15
       GAS =    1
RLP_TX_RCPT =    7
       MXP =    3
BLAKE_2_F_MODEXP_DATA =    0
      MMIO =    1
       HUB =    1
       EXT =    7
       MUL =    8
  LOG_DATA =    1
 HASH_DATA =    0
       MOD =    7
       ROM =    1
    BIN_RT =    0
       EXP =    5
   SHAKIRA =    4
       WCP =   15
  LOG_INFO =    5
       TRM =    7
  RLP_ADDR =    7
       EUC =    1
   RLP_TXN =    7
 HASH_INFO =    0
       ADD =    1
       STP =    4

However, it is worth noting some differences from the original file. For example, we have LOG_INFO above and PUB_LOG_INFO in the original file. Likewise, SHF_RT is listed above but was not present in the original file.

@powerslider Thoughts / comments?