Add support to customize the RetryHydrate function

[Subhajit97]

type RetryConfig struct {
	ShouldRetryErrorFunc ErrorPredicateWithContext
	// deprecated use ShouldRetryErrorFunc
	ShouldRetryError ErrorPredicate

	// Maximum number of retry operation to be performed. Default set to 10.
	MaxAttempts int64
	// Algorithm for the backoff. Supported values: Fibonacci, Exponential, and Constant. Default set to Fibonacci.
	BackoffAlgorithm string
	// Starting interval. Default set to 100ms.
	RetryInterval int64
	// Set a maximum on the duration (in ms) returned from the next backoff.
	CappedDuration int64
	// Sets a maximum on the total amount of time (in ms) a backoff should execute.
	MaxDuration int64
}

[kaidaguerre]

you could always rephrase this to

retryInterval := 100 * time.Millisecond

to avoid the need for a comment