[HttpClient] Parameterize list of retryable methods

[jderusse]

Q	A
Branch?	master
Bug fix?	no
New feature?	yes
Deprecations?	no
Tickets	/
License	MIT
Doc PR	TODO

Retrying non-idempotent methods is not always acceptable for user. This PR adds an easy way to configure this behavior.

The RetryDeciderInterface::shouldRetry() now take the exception in parameter, in order to let decider not retrying the request when the methods should never by retried.

With #38420, this code would belongs to the RetryStrategy implementation, and would return an NeverRetryDecider when method is not allowed.

[jderusse]

I wonder if the implementation/configuration shouldn't be more complicated:

• 423, 425, 429, 503 => always
• 500, 502, 504, 507, 510 => idempotent only

Maybe:
ChainDecider

• StatusCodeDecider([423, 425, 429, 503])
• IdempotentStatusCodeDecider([500, 502, 504, 507, 510], [GET, HEAD, PUT, DELETE, TRACE, OPTIONS, CONNECT]

[jderusse]

failling test are related to Could not parse version constraint >=5.x: Invalid version string "5.x" And related to async-aws that should be fixed by async-aws/aws#802

[Nyholm]

Thank you. I like this. I added a bunch of questions for things I dont understand.

[nicolas-grekas]

Let's settle on #38532 before merging (and rebasing) this one.

[nicolas-grekas]

for exceptions, we could use the status code 0

[fabpot]

Thank you @jderusse.