[Enhancement]: Don't call getLogs() twice in `Container#tryStart`

[AB-xdev]

Module

Core

Proposal

Code:

testcontainers-java/core/src/main/java/org/testcontainers/containers/GenericContainer.java

Lines 540 to 544 in deb78e1

	// Log output if startup failed, either due to a container failure or exception (including timeout)
	final String containerLogs = getLogs();
	if (containerLogs.length() > 0) {
	logger().error("Log output from the failed container:\n{}", getLogs());

Should probably call getLogs() only once as it is not expected to change in between calls