provider: Adds SSO endpoint override

[gdavison]

Description

Adds parameter endpoints.sso to override the SSO API endpoint.

Depends on release of hashicorp/aws-sdk-go-base#741

Relations

Relates #33952

Output from Acceptance Testing

% TF_ACC=1 go test ./internal/provider/... -v -count=1 -parallel 20 -timeout=0

--- PASS: TestProviderConfig_Authentication_SSO (0.09s)
    --- PASS: TestProviderConfig_Authentication_SSO/shared_configuration_file (0.09s)
--- PASS: TestProviderConfig_Authentication_LegacySSO (0.09s)
    --- PASS: TestProviderConfig_Authentication_LegacySSO/shared_configuration_file (0.09s)
--- PASS: TestExpandEndpoints (0.00s)
--- PASS: TestEndpointMultipleKeys (0.00s)
--- PASS: TestEndpointEnvVarPrecedence (0.00s)
--- PASS: TestInterceptorsWhy (0.00s)
--- PASS: TestValidAssumeRoleDuration (0.00s)
--- PASS: TestTagsResourceInterceptor (0.00s)
--- PASS: TestProvider (0.09s)
--- PASS: TestAccProvider_AssumeRole_empty (126.99s)
--- PASS: TestAccProvider_Region_stsRegion (157.60s)
--- PASS: TestAccProvider_Region_commercial (157.64s)
--- PASS: TestInterceptedHandler (0.00s)
--- PASS: TestAccProvider_Region_c2s (159.78s)
--- PASS: TestAccProvider_Region_sc2s (159.78s)
--- PASS: TestAccProvider_Region_govCloud (161.45s)
--- PASS: TestAccProvider_Region_china (161.54s)
--- PASS: TestAccProvider_IgnoreTagsKeyPrefixes_multiple (182.91s)
--- PASS: TestAccProvider_IgnoreTags_emptyBlock (185.74s)
--- PASS: TestAccProvider_DefaultTagsTags_none (186.96s)
--- PASS: TestAccProvider_DefaultAndIgnoreTags_emptyBlocks (188.12s)
--- PASS: TestAccProvider_IgnoreTagsKeyPrefixes_none (188.27s)
--- PASS: TestAccProvider_DefaultTags_emptyBlock (189.26s)
--- PASS: TestAccProvider_DefaultTagsTags_one (189.27s)
--- PASS: TestAccProvider_IgnoreTagsKeys_one (189.31s)
--- PASS: TestAccProvider_IgnoreTagsKeys_multiple (189.31s)
--- PASS: TestAccProvider_IgnoreTagsKeys_none (189.32s)
--- PASS: TestAccProvider_endpoints (204.75s)
--- PASS: TestAccProvider_unusualEndpoints (204.77s)
--- PASS: TestAccProvider_IgnoreTagsKeyPrefixes_one (93.65s)
--- PASS: TestAccProvider_fipsEndpoint (223.74s)
--- PASS: TestAccProvider_DefaultTagsTags_multiple (68.22s)

[github-actions]

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[github-actions]

Thank you for your contribution! 🚀

A new usage of AWS SDK for Go V1 was detected. Please prefer AWS SDK for Go V2 for all net-new services. If this is an enhancement or bug fix to an existing AWS SDK Go V1 based resource, this comment can be safely ignored.

For additional information refer to the AWS SDK for Go Versions page in the contributor guide.

[ewbankkit]

Needs a CHANGELOG entry.

[github-actions]

This functionality has been released in v5.25.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.