Enable detailed exec trace by default for user initiated action

[jennijuju]

Checklist

• This is not a new feature or an enhancement to the Filecoin protocol. If it is, please open an FIP issue.
• This is not a new feature request. If it is, please file a feature request instead.
• This is not brainstorming ideas. If you have an idea you'd like to discuss, please open a new discussion on the lotus forum and select the category as Ideas.
• I have a specific, actionable, and well motivated improvement to propose.

Lotus component

• lotus daemon - chain sync
• lotus miner - mining and block production
• lotus miner/worker - sealing
• lotus miner - proving(WindowPoSt)
• lotus miner/market - storage deal
• lotus miner/market - retrieval deal
• lotus miner/market - data transfer
• lotus client
• lotus JSON-RPC API
• lotus message management (mpool)
• Other

Improvement Suggestion

with #8514 , to get full gas tracing and execution trace, the node operator needs to enable * LOTUS_VM_ENABLE_TRACING*, which is a breaking behaviour from legacy user from a getting exeuction trace persepctive.

Suggestion: We should:

• always generate full execution traces when it's an user iniitated action, i.e, when calling statereplay/statecompute/statecall
• rename LOTUS_VM_ENABLE_TRACING to LOTUS_VM_ENABLE_GAS_TRACING and only generate gas tracew when this envvar is enabled.
• During normal sync, generate nothing