[flake8-type-checking] Stabilize unquoted-type-alias (TC007) (#16638)

Summary
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Stabilizes TC007. The test was already in the right place.

Test Plan
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No open issues or PRs.

Author: ntBre

crates/ruff_linter/src/codes.rs

@@ -872,7 +872,7 @@ pub fn code_to_rule(linter: Linter, code: &str) -> Option<(RuleGroup, Rule)> {
         (Flake8TypeChecking, "004") => (RuleGroup::Stable, rules::flake8_type_checking::rules::RuntimeImportInTypeCheckingBlock),
         (Flake8TypeChecking, "005") => (RuleGroup::Stable, rules::flake8_type_checking::rules::EmptyTypeCheckingBlock),
         (Flake8TypeChecking, "006") => (RuleGroup::Preview, rules::flake8_type_checking::rules::RuntimeCastValue),
-        (Flake8TypeChecking, "007") => (RuleGroup::Preview, rules::flake8_type_checking::rules::UnquotedTypeAlias),
+        (Flake8TypeChecking, "007") => (RuleGroup::Stable, rules::flake8_type_checking::rules::UnquotedTypeAlias),
         (Flake8TypeChecking, "008") => (RuleGroup::Preview, rules::flake8_type_checking::rules::QuotedTypeAlias),
         (Flake8TypeChecking, "010") => (RuleGroup::Stable, rules::flake8_type_checking::rules::RuntimeStringUnion),