Revert "add support for IAM Group authentication to google_sql_user"

[NickElliot]

Reverts #9505

Feature was not launched yet and unconveyed during review cycle

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

Terraform GA: Diff ( 3 files changed, 3 insertions(+), 17 deletions(-))
Terraform Beta: Diff ( 3 files changed, 3 insertions(+), 17 deletions(-))

[modular-magician]

Tests analytics

Total tests: 3241
Passed tests 2909
Skipped tests: 331
Affected tests: 1

Action taken

Found 1 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit. Click here to see the affected tests

TestAccDataprocJobIamPolicy

Get to know how VCR tests work

[modular-magician]

$\textcolor{green}{\textsf{Tests passed during RECORDING mode:}}$
TestAccDataprocJobIamPolicy[Debug log]

Rerun these tests in REPLAYING mode to catch issues

$\textcolor{green}{\textsf{No issues found for passed tests after REPLAYING rerun.}}$

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$\textcolor{green}{\textsf{All tests passed!}}$
View the build log or the debug log for each test