chore: replace create-fuels hardcoded values with constants

[Dhaiwat10]

• Closes create fuels remove hardcoded values #2464

Checklist

• I added — tests to prove my changes
• I updated — all the necessary docs
• I reviewed — the entire PR myself, using the GitHub UI
• I described — all breaking changes and the Migration Guide

[Dhaiwat10]

@petertonysmith94 I didn't remove the hardcoded values on the faucet page since it's only really a pre-filled default placeholder value for the amount to send and a named constant for it will be overkill in my opinion

[petertonysmith94]

@Dhaiwat10 looks good - do you think it's worth doing the amounts as well?

Hardcoded amounts that we use (ref1 | ref2)

[Dhaiwat10]

Yes I was referring to those values in this comment: #2752 (comment)

I don't think it's worth it, as it's just a placeholder value which is pretty self-explanatory via the variable's name and it's never re-used anywhere else

[github-actions]

Coverage Report:

Lines	Branches	Functions	Statements
79.37%(-0.04%)	71.65%(-0.02%)	77.3%(+0.27%)	79.5%(+0.02%)

Changed Files:

Ok	File (✨=New File)	Lines	Branches	Functions	Statements
🔴	packages/account/src/test-utils/launchNode.ts	98.26% (-1.74%)	84.74% (-1.22%)	100% (+21.43%)	98.34% (+3.43%)