Fix data race in TypeObjectFactory::get_instance (#5238)

* Refs #21664. Regression test.

Signed-off-by: Miguel Company <[email protected]>

* Refs #21664. Improve synchronization in regression test.

Signed-off-by: Miguel Company <[email protected]>

* Refs #21664. Return created instance to visualize data-race and make test fail.

Signed-off-by: Miguel Company <[email protected]>

* Refs #21664. Just count the number of different instances.
This way we have a single final expectation.

Signed-off-by: Miguel Company <[email protected]>

* Refs #21664. Avoid using g_instance inside the instance.

Signed-off-by: Miguel Company <[email protected]>

* Refs #21664. Inject factory in all methods called inside `register_builtin_annotations_types`.

Signed-off-by: Miguel Company <[email protected]>

* Refs #21664. Use atomic enumeration to control the instance state.

Signed-off-by: Miguel Company <[email protected]>

* Refs #21664. Uncrustify.

Signed-off-by: Miguel Company <[email protected]>

* Refs #21672. Notify condition from main thread.

Signed-off-by: Miguel Company <[email protected]>

* Refs #21672. FIx EOL at end of file.

Signed-off-by: Miguel Company <[email protected]>

* Refs #21672. Refactor to create builtin objects inside factory constructor.

Signed-off-by: Miguel Company <[email protected]>

* Refs #21672. Uncrustify.

Signed-off-by: Miguel Company <[email protected]>

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Signed-off-by: Miguel Company <[email protected]>