add gas price multiples

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 95.12195% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 80.67%. Comparing base (037f062) to head (f62b6c7).

Files	Patch %	Lines
src/agent0/core/hyperdrive/policies/random.py	85.71%	1 Missing :warning:
src/agent0/ethpy/base/transactions.py	92.30%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1433 +/- ## ========================================== - Coverage 80.73% 80.67% -0.07% ========================================== Files 104 104 Lines 6458 6473 +15 ========================================== + Hits 5214 5222 +8 - Misses 1244 1251 +7 ``` | [Flag](https://app.codecov.io/gh/delvtech/agent0/pull/1433/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=delvtech) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/delvtech/agent0/pull/1433/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=delvtech) | `80.67% <95.12%> (-0.07%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=delvtech#carryforward-flags-in-the-pull-request-comment) to find out more.

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