Declare a rule, when people are calling TestContainer build too early.

# Why?
When called in wrong order, then:
`Environment.SetEnvironmentVariable("TESTCONTAINERS_HUB_IMAGE_NAME_PREFIX", "YOUR_INTERNAL_MIRROR");` does not work.

E.g. If you call
```
private readonly INetwork _network = new NetworkBuilder()
.WithName("shared_test_network")
.Build();
```

or
```
private PostgreSqlContainer _postgreSqlContainer = new PostgreSqlBuilder()
.WithNetwork(_network)
.WithNetworkAliases("postgres")
.Build()
```

before the Environment variable is set, then none of the images will get the variable.

# What?
Most likely we need a critical analyzer rule here.