Disable noisy `detect-object-injection` rule by default
### Proposal In https://gitlab.com/gitlab-org/gitlab/-/issues/351399, we disabled `detect-object-injection` behind the `SAST_EXPERIMENTAL_FEATURES` flag. For reasoning about why this rule deserved to be disabled, see the issue. This issue tracks making this change available to all customers by default, without passing `SAST_EXPERIMENTAL_FEATURES`.
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