Update near-sdk-rs from 4.1.1 to 5.0.0-alpha.2

[PolyProgrammist]

• Updated near-sdk-rs from 4.1.1 to 5.0.0-alpha.2
• Updated near-sdk-rs in community and community-factory from 5.0.0-alpha.1 to 5.0.0-alpha.2
• Added #[borsh(crate = "near_sdk::borsh")] where it was necessary
• Added #[derive(Ord)] where it was necessary
• Used pub type Balance = u128; instead of near_sdk::Balance
• Changed gas type for new one (including usage of construction and operations with gas - div / sub / etc)
• Changed version.try_to_vec() to borsh::to_vec(&version)
• Changed u128 to NearToken
• Changed toolchain from 1.69.0 to 1.75.0 as in Near core
• Updated packages chrono and near-workspaces

[frol]

I have also checked that the contract size decreased by 3kb (748kb -> 745kb)