Pectra ready (deposit amount 32 to 2048 ETH)

[pavelkrolevets]

Ethereum going to change deposit amount to allow it in range 32 to 2048 ETH eip7251

• updated init, resign, reshare types to include amount
• update add checks for amount range from 32 to 2048 eth
• use amount to create deposit sigs + validation

[MatusKysel]

good job

[GalRogozinski]

just add tests for invalid amount sets for each case (below and above threshold) in init, resign and reshare (if reshare is necessary)

[alan-ssvlabs]

LGTM