feat: add account management methods to GRE

[tmigone]

Motivation

This PR introduces yet more GRE changes which will come in handy in the future.

Changes

• Split e2e tests into deployment config and init
• Add account methods to GRE: getNamedAccounts, getTestAccounts and getDeployer
• Add missing config to graph config file on goerli

Signed-off-by: Tomás Migone [email protected]

[codecov]

Codecov Report

Merging #645 (6e68b48) into dev (bc6e119) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev     #645   +/-   ##
=======================================
  Coverage   90.29%   90.29%           
=======================================
  Files          35       35           
  Lines        1752     1752           
  Branches      293      293           
=======================================
  Hits         1582     1582           
  Misses        170      170           

Flag	Coverage Δ
unittests	90.29% <ø> (ø)

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[abarmat]

All the improvements look great, only thing I find a bit odd is the test accounts mixed with the named ones.