chore: revert add signTransaction to FuelConnectorMethods enum

[Torres-ssf]

• Closes Remove signTransaction method from FuelConnectorMethods enum #3148
• Closes TS-645

Release notes

In this release, we:

• Removed signTransaction method from FuelConnectorMethods enum

Summary

This PR reverts #3128.

Checklist

• All changes are covered by tests (or not applicable)
• All changes are documented (or not applicable)
• I reviewed the entire PR myself (preferably, on GH UI)
• I described all Breaking Changes (or there's none)

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Name	Status	Preview	Comments	Updated (UTC)
create-fuels-template	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 11, 2024 4:09pm
ts-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 11, 2024 4:09pm

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
create-fuels-counter-example	⬜️ Ignored (Inspect)			Sep 11, 2024 4:09pm

[github-actions]

Coverage Report:

Lines	Branches	Functions	Statements
78.86%(-0.49%)	71.75%(-0.4%)	77.2%(-0.53%)	78.94%(-0.48%)

Changed Files:

Ok	File (✨=New File)	Lines	Branches	Functions	Statements
🔴	packages/account/src/providers/transaction-request/transaction-request.ts	88.57% (+0%)	76.71% (-1.37%)	84% (+0%)	88.81% (+0%)
🔴	✨ packages/account/src/providers/transaction-request/upgrade-transaction-request.ts	18.75% (+18.75%)	31.57% (+31.57%)	25% (+25%)	18.75% (+18.75%)
🔴	✨ packages/account/src/providers/transaction-request/upload-transaction-request.ts	31.57% (+31.57%)	66.66% (+66.66%)	28.57% (+28.57%)	31.57% (+31.57%)
🔴	packages/account/src/providers/transaction-summary/operations.ts	94.21% (-1.58%)	69.11% (-2.1%)	93.47% (+0%)	92.96% (-1.48%)
🔴	packages/account/src/providers/utils/gas.ts	75.75% (-18.58%)	85.18% (-6.82%)	75% (-17.3%)	76.11% (-18.33%)