Possible to make `fuels_core` WASM compatible?

[ra0x3]

• On the indexer team we have a really really old bug/hack that we'd like to finally fix
  • https://github.com/FuelLabs/fuel-indexer/issues/408
• The issue is related to some dependency that the indexer uses, pulling in fuel-tx default features
• On the indexer, we always specify default-features = false for fuel-tx
• However, due to cargo workspace dependency unification if some other dependency pulls in fuel-tx default features, it doesn't matter that the indexer doesn't directly import fuel-tx default features
  • The default features will still be pulled in, even if any indexer dependency is pulling in the default features
• As of now, the culprit seems to be fuels_core
• Is it possible to make fuels_core not pull in these default features from fuel-tx?
• We won't be able to fix our issue/hack ☝🏽 until this is possible
• Without fixing this hack, users won't be able to use WASM-friendly crates such as tai64 or chrono - so there's user impact

CC @digorithm @segfault-magnet

[hal3e]

blocked by: https://github.com/FuelLabs/fuel-vm/issues/443

[xgreenx]

Now it is blocked by: https://github.com/FuelLabs/fuel-core/issues/1370