[DO NOT MERGE] Try to find deprecations

[felixfontein]

SUMMARY

This PR uses https://github.com/felixfontein/ansible/commits/show-deprecations/ to run the tests with ansible-test from ansible-core devel. This should not hide all deprecations, as ansible-test usually does (ansible/ansible#85436).

Ref: ansible-collections/community.general#10540

ISSUE TYPE

• Test Pull Request

COMPONENT NAME

CI

[felixfontein]

This mainly exposes one deprecation in ansible-core used in the integration tests:

2025-08-02T14:29:19.1917711Z 01:29 TASK [luks_device : Create with keyfile3] **************************************
2025-08-02T14:29:22.5569075Z 01:32 �[1;35m[WARNING]: Deprecation warnings can be disabled by setting `deprecation_warnings=False` in ansible.cfg.�[0m
2025-08-02T14:29:22.5570615Z 01:32 �[0;35m[DEPRECATION WARNING]: File '/home/alpine/ansible_collections/community/crypto/tests/output/.tmp/integration/luks_device-8m_bd2_g-ÅÑŚÌβŁÈ/tests/integration/targets/luks_device/files/keyfile3' could not be decoded as 'utf-8'. Invalid content has been escaped. This feature will be removed from ansible-core version 2.23. This file must be UTF-8 encoded.�[0m
2025-08-02T14:29:22.5601713Z 01:32 �[0;33mchanged: [testhost] => {"changed": true, "name": null}�[0m

Using the ansible.builtin.file lookup for binary files has never been a good idea, and is now officially deprecated.

I think we need a binary_file lookup that allows to read binary files (and base64 encodes them). Maybe something for community.general?