fix: ganache shift bug & geth depth

[matnad]

What I did

1. Distinguish if we have a ganache or geth trace and save to tx._trace_origin
2. Shift ganache gas costs by one step
3. Reduce depth of geth traces by 1
4. Added tx._call_cost = overhead cost to initiate the transaction

Related issue: #561

How I did it

see PR

How to verify it

tx.trace

Checklist

• I have confirmed that my PR passes all linting checks
• I have included test cases
• I have updated the documentation
• I have added an entry to the changelog

[codecov]

Codecov Report

Merging #562 into master will decrease coverage by 0.05%.
The diff coverage is 58.33%.

@@            Coverage Diff             @@
##           master     #562      +/-   ##
==========================================
- Coverage   88.00%   87.94%   -0.06%     
==========================================
  Files          56       56              
  Lines        6319     6331      +12     
  Branches     1396     1399       +3     
==========================================
+ Hits         5561     5568       +7     
- Misses        523      527       +4     
- Partials      235      236       +1     

Impacted Files	Coverage Δ
brownie/network/transaction.py	86.17% <58.33%> (-0.70%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a888fc6...4e6cfb1. Read the comment docs.

[iamdefinitelyahuman]

For the ganache portion, this is a (hopefully) temporary fix until trufflesuite/ganache#277 is resolved.