Improve Wazuh indexer GHA tests

[rauldpm]

Description

It is necessary to analyze and modify the GHA of the Wazuh indexer that checks the SHA of the configuration files in the upgrades since this is not maintainable nor does it take into account accepted changes in said files.

An example would be the following issue #2429, where it is reported that the config.yml file has been modified, which is true since the said file was modified to encapsulate the IPs in double quotes.

It is proposed to replace the test to check the SHA of the files with a functional test where the reliability of the changes is checked. This could be considered in two ways:

1. Remove the SHA check and add the new test
2. Keep the SHA check and run the test if a file changes

[rauldpm]

Issue closed due: #2429 (comment)