[Healtcheck] Remove tolerance dependency

[shouze]

Actual TcpHealthcheck constructor is made like that:

ubirak-php/src/Component/Healthcheck/TcpHealthcheck.php

Line 38 in e22ac41

public function __construct(float $initialExponent, float $step, float $maxExecutionTime, LoggerInterface $logger = null)

... and later on we build from the inside this kind of retry operation by using Tolerance:

ubirak-php/src/Component/Healthcheck/TcpHealthcheck.php

Lines 55 to 62 in e22ac41

	$runner = new RetryOperationRunner(
	new CallbackOperationRunner(),
	new ExponentialBackOff(
	new Timeout(new SleepWaiter(), $this->maxExecutionTime),
	$this->initialExponent,
	$this->step
	)
	);

Would be great to have that Tolerance part:

• optional we can want to make a single healthcheck
• external to this TcpHealthcheck class... thus removing Tolerance requirement in composer.json

That said... the best way probably is to inject a TcpClient that will be able to be decorated at will by some Tolerance operation.

WDYT @ubirak/core?