Added cintegration-ecs-backend.yml to include test job that matches the current cypress.yml workflow inside the graasp repo. Add the appropriate secrets to the cintegration-ecs-backend-caller.yml

Updated the build job for ecs-backend. Now the ecs-backend workflow has the following jobs:

• build: install yarn dependencies and cache them for the test job, build image and cache it for the test job. Removed the build docker from this step and moved it to the deploy job. This is because build and test jobs will be executed every time we push a commit, so we avoid pushing images to ECR every time.
• test: cache yarn dependencies and build image, and run yarn test
• deploy: tag the image, build the docker image, push to the registry, fill task definition and deploy to dev.

Updated the build job for ecs-explorer. Now the ecs-explorer workflow has the following jobs:

• build: install yarn dependencies and cache them for the test job, build image and cache it for the test job. Removed the build docker from this job and moved it to the deploy job. This is because build and test jobs will be executed every time we push a commit, so we avoid pushing images to ECR every time.
• test: cache yarn dependencies and build image, and run cypress test
• deploy: tag the image, build the docker image, push to the registry, fill task definition and deploy to dev.

@victorggonzalez @pyphilia, is this ready to merge?

I think this PR is too far behind the main branch to be applied. We should report the changes to a new branch.

I've already applied cache to workflows with a composite so this part is already done.