Bump max timeout for REST API Gateway to 5 mins

[chainchad]

Description

AWS recently announced that the REST API Gateways had an increased timeout limit and this bumps that max timeout validation check from 29 seconds to 300 seconds.

edit: going to up to 5 mins would require a service quota increase per AWS account.

Relations

Closes #23417
Closes #37859

References

• https://aws.amazon.com/about-aws/whats-new/2024/06/amazon-api-gateway-integration-timeout-limit-29-seconds/
• https://docs.aws.amazon.com/apigateway/latest/developerguide/limits.html#api-gateway-execution-service-limits-table

Output from Acceptance Testing

% make testacc TESTS=TestAccXXX PKG=ec2

...

[github-actions]

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[github-actions]

Welcome @chainchad 👋

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[dhrkumar]

@chainchad do we have any reference which documents maximum quota for integration timeout in REST API is 300 seconds now? I see the documentation refers that it might require a reduction in account-level throttle quota limit but doesn't mention any explicit maximum quota.

[chainchad]

@dhrkumar I was given 300s as an example from AWS support but that might not be a true maximum. Going to try and confirm. If there's no enforced maximum (seems unlikely), I suppose we can just enforce the minimum timeout?

From AWS:

PLEASE NOTE - YOUR ACCOUNT LEVEL RPS WILL BE LOWERED ACCORDING TO THE FORMULA: 10,000 / [(IntegrationTimeoutLimit Seconds) / 29]

[chainchad]

Just heard back from AWS support that 300s is the true maximum and I've asked if their docs can reflect that.

[ewbankkit]

@chainchad Thanks for the contribution 🎉 👏.
This change has been included in #38010.