Use in memory logging for each sandbox test

[denis-tingaikin]

Problem statement

If test failed on ci we can not get logs from nsm components.

Solution

Always write logs into memory logger.

If t.Failed() then push all logs into stdout.

Memory logger implementation

1. add new pkg into tools/log/memorylogger
2. use the logger with https://github.com/networkservicemesh/sdk/blob/main/pkg/tools/log/logger.go#L75 for each test
3. write logs into stdout if t.Failed()

[NikitaSkrynnik]

Blocked by https://github.com/networkservicemesh/sdk/issues/1182