Feature: dependsOn functionality for DockerContainer

What are you trying to do?

Improve TC-python feature parity with TC-java by enabling container to specify dependsOn, which should work similar to how depends_on in docker-compose does - container B that depends on container A won't be started until container A is in running state.

Why should it be done this way?

Control order/behavior for container startup in multi-container scenarios.

Other references:

Include any other relevant reading material about the enhancement.

首先在 TC-python 中定位 DockerContainer，并将其 API 与 TC-java 的 dependsOn 功能以及 docker-compose 的启动行为进行比较。找到现有的多容器测试，然后添加覆盖，证明容器 A 达到 running 状态之前容器 B 不会启动；完成的标准是该行为在多容器场景下正常工作。