[LIVE-7357] Feature - Decrease EIP-1559 base fee multiplier

[lambertkevin]

✅ Checklist

• npx changeset was attached.
• Covered by automatic tests.
• Impact of the changes:
  • Transactions using EIP-1559 will now only be sure to have enough base fee to be included in the next 3 blocks instead of the next 4 blocks before

📝 Description

Ledger Live is using a base fee multiplier to make sure the transactions crafted can be included in X blocks in the future based on the EIP-1559 spec.

Example of the fee system from Blocknative:

Block	Base Fee	% Full	Increase in Base Fee	Priority Fee specified	Max Fee specified	Gas Price Paid if confirmed
1	100.0 GWEI	100%	12.5%	2.0	202.0	102.0
2	112.5 GWEI	100%	12.5%	2.0	202.0	114.5
3	126.6 GWEI	100%	12.5%	2.0	202.0	128.6
4	142.4 GWEI	100%	12.5%	2.0	202.0	144.4
5	160.2 GWEI	100%	12.5%	2.0	202.0	162.2
6	180.2 GWEI	100%	12.5%	2.0	202.0	182.2
7	202.7 GWEI	-	-	2.0	202.0	Ineligible

Until now we were having a 50% increase of the base fee which ensured at least 4 blocks even in the worst network conditions, we're decreasing to 27% ensuring 3 blocks now.

❓ Context

• JIRA or GitHub link: https://ledgerhq.atlassian.net/browse/LIVE-7357

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🧐 Checklist for the PR Reviewers

• The code aligns with the requirements described in the linked JIRA or GitHub issue.
• The PR description clearly documents the changes made and explains any technical trade-offs or design decisions.
• There are no undocumented trade-offs, technical debt, or maintainability issues.
• The PR has been tested thoroughly, and any potential edge cases have been considered and handled.
• Any new dependencies have been justified and documented.
• Performance considerations have been taken into account. (changes have been profiled or benchmarked if necessary)

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