chore: Upgrades teams resource to auto-generated SDK

[oarbusi]

Description

Upgrades teams resource to auto-generated SDK.

Migration tests created.

Link to any related issue(s): CLOUDP-226093

Type of change:

• Bug fix (non-breaking change which fixes an issue). Please, add the "bug" label to the PR.
• New feature (non-breaking change which adds functionality). Please, add the "enhancement" label to the PR.
• Breaking change (fix or feature that would cause existing functionality to not work as expected). Please, add the "breaking change" label to the PR.
• This change requires a documentation update
• Documentation fix/enhancement

Required Checklist:

• I have signed the MongoDB CLA
• I have read the contribution guidelines
• I have checked that this change does not generate any credentials and that they are NOT accidentally logged anywhere.
• I have added tests that prove my fix is effective or that my feature works per HashiCorp requirements
• I have added any necessary documentation (if appropriate)
• I have run make fmt and formatted my code
• If changes include deprecations or removals, I defined an isolated PR with a relevant title as it will be used in the auto-generated changelog.
• If changes include removal or addition of 3rd party GitHub actions, I updated our internal document. Reach out to the APIx Integration slack channel to get access to the internal document.

Further comments

[wtrocki]

[optional] misc.go seems like good candidate for sdk-go class.

[lantoli]

i don't think team param is needed, i've changed in other resources to have checkExists only with resourceName and use normal resource.TestCheckResourceAttr for checking all attributes we want, e.g: https://github.com/mongodb/terraform-provider-mongodbatlas/pull/1897/files#diff-ffad5b36ece89e3e5aec3c355741582e635a69feae36b8ff4538ff08a2f04f6aR91