chore: migrate subgraph to 0xgraph

[levalleux-ludo]

Description

• closes subgraph; migrate from TheGraph hosted services to 0xGraph #840
• fixes 0xgraph requires managing the subgraph "latest" tag #796
• closes subgraph deployment to amoy (the graph network) by CI pipeline does not work (requires a deploy key) #715

How to test

{{how can it be tested}}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.26%. Comparing base (c0ce9b9) to head (112850f).
Report is 98 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #784      +/-   ##
==========================================
+ Coverage   90.11%   90.26%   +0.15%     
==========================================
  Files         162      163       +1     
  Lines        6009     6061      +52     
  Branches      915      927      +12     
==========================================
+ Hits         5415     5471      +56     
+ Misses        594      590       -4     

Flag	Coverage Δ
common	92.11% <ø> (ø)
core-sdk	59.50% <ø> (+1.67%)	⬆️
e2e	87.19% <ø> (-0.12%)	⬇️
eth-connect-sdk	94.87% <ø> (-2.47%)	⬇️
ethers-sdk	69.62% <ø> (-0.41%)	⬇️
ipfs-storage	89.41% <ø> (-1.26%)	⬇️
metadata	94.70% <ø> (ø)
unittests	62.91% <ø> (+1.43%)	⬆️

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✅ levalleux-ludo
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[albertfolch-redeemeum]

why dont we keep this to force redeploying?

[levalleux-ludo]

IMHO the branches option on the workflow_dispatch event is not correct (never mentionned in the GH docs: https://docs.github.com/en/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows#workflow_dispatch).
The idea having workflow_dispatch is to allow running the job with a manual trigger and it's always possible to choose the branch there.

[levalleux-ludo]

Note: the other event is the one that is trigerring the job when there is a push on main branch with changes in the subgraph package

push:
    branches:
      - 'main'
    paths:
      - packages/subgraph/**