Add integration tests and regtest support (#128)

* regtest support + integration tests (e2e)

* add integration CI

* add PR trigger on integration CI

* wait for ocean to be unlocked at startup

* integration tests: add tests flags and build docker images at startup

* use nigiri chopsticks-liquid

* fix after reviews

* Update client/init.go

Co-authored-by: Pietralberto Mazza <18440657+altafan@users.noreply.github.com>
Signed-off-by: Louis Singer <41042567+louisinger@users.noreply.github.com>

* do not trigger integration on PR

---------

Signed-off-by: Louis Singer <41042567+louisinger@users.noreply.github.com>
Co-authored-by: Pietralberto Mazza <18440657+altafan@users.noreply.github.com>

.github/workflows/ark.integration.yaml

@@ -20,6 +20,10 @@ jobs:
           go-version: ">1.17.2"
       - uses: actions/checkout@v3
       - run: go get -v -t -d ./...
+      
+      - name: Run Nigiri
+        uses: vulpemventures/nigiri-github-action@v1
+
       - name: integration testing
         run: make integrationtest