Remove --sync-trustless config param

[joshklop]

Description

Juno panics if only --sync-enable is provided. We can fix this by removing the need for the --sync-trustless param.

Changes

• Remove the --sync-trustless config param. Instead, try to connect to an Ethereum node. If the connection fails for any reason, default to syncing with the feeder gateway.
• Update documentation

Types of changes

• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update

Testing

Requires testing? No (no unit tests written for the main package at this time, see #301). This was manually tested.

Documentation

If this requires a documentation update, did you add one? Yes

[codecov[bot]]

Codecov Report

Merging #337 (3825d43) into main (fcfe1e1) will decrease coverage by 0.00%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #337      +/-   ##
==========================================
- Coverage   99.62%   99.62%   -0.01%     
==========================================
  Files          55       55              
  Lines        6464     6461       -3     
==========================================
- Hits         6440     6437       -3     
  Misses         24       24              

Flag	Coverage Δ
unittests	99.62% <ø> (-0.01%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
internal/sync/sync.go	100.00% <ø> (ø)
pkg/crypto/weierstrass/weierstrass.go	100.00% <0.00%> (ø)

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