Need some works on making tests look more friendly

Métricas do repositório

Is your feature request related to a problem? Please describe:

Ref to question: #2705. Use this issue to track the progress.

Describe the feature you'd like:

works need to do:

add more description/guide/schematic diagram for running integration test on github workflow and local, like the detail step, or the recommend way, or things we should pay attention to.
need a script to download dependent binary for local integration test, can ref to the ci : https://github.com/PingCAP-QE/ci/blob/0168669f271712bcde92dff2603fcf962d90c69b/jenkins/pipelines/ci/ticdc/integration_test_common.groovy#L242-L279 (https://github.com/pingcap/ticdc/pull/3502)
reduce debug outputs of every integration test, redirect to other medias. Output sketch info just like gtest or testify.
need an overview for current integration tests，make category and workflow description.
need a brief introduction for workflow of integration test on github for new contirbutor

Describe alternatives you've considered:

Teachability, Documentation, Adoption, Migration Strategy:

Direção de pesquisa: Revise a documentação e os scripts de teste de integração existentes no repositório e identifique as lacunas e melhorias listadas nas caixas de seleção. Concentre se em criar um guia para executar testes de integração localmente e no GitHub Actions, e proponha um script para baixar as dependências. Observe o script de CI de exemplo vinculado no problema.
Pilha de tecnologia: go
Domain: backendtesting
Tipo Issue: Documentação
Difficulty: 2
Tempo estimado: Meio dia
Status da atividade: Recente
Clarity: Claro
Prerequisites: GitGo
Simpatia para novatos: 80