fix: no longer require ExactlyOneOf web_identity_token or web_identity_token_file in provider config

[derekheld]

Description

ExactlyOneOf does not permit the usage of the AWS_WEB_IDENTITY_TOKEN_FILE environment variable, but web_identity_token and web_identity_token_file do conflict with each other. Switch to ConflictsWith to prevent that conflict while still not explicitly requiring one of either to be set.

Relations

Closes #37401

References

Provider configuration docs covering assume role with web identity

Output from Acceptance Testing

% make testacc TESTS=TestAccXXX PKG=ec2

...

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[derekheld]

Could I get some clarification on what acceptance tests I would need to run for this change?

[gdavison]

Thanks for the PR, @derekheld

Could I get some clarification on what acceptance tests I would need to run for this change?

It looks like we don't have any tests around this particular parameter

[derekheld]

Thanks for the PR, @derekheld

Could I get some clarification on what acceptance tests I would need to run for this change?

It looks like we don't have any tests around this particular parameter

Well that would explain why I was having a hard time finding one 😅

[derekheld]

I apologize, this is not just my first time contributing to this project but also my first time doing any development in Go. A lot of learning for me to do.

[gdavison]

I apologize, this is not just my first time contributing to this project but also my first time doing any development in Go. A lot of learning for me to do.

Nothing to apologize for! Everyone has to start somewhere. Go is known for its opinionated formatting, and we have a bunch of automated style checks on top of that