Refactor GitHub Actions workflows

[morozov]

The problem

If a build with unstable dependencies (e.g. a development PHP version) fails, it fails the entire job (example).

The solution

1. Introduce a reusable parameterized workflow per driver (e.g. Run "PHPUnit on MySQL")
2. Reference it from the corresponding job in the "Continuous Integration" workflow; leave only stable dependencies there.
3. Move the builds against development PHP versions into the nightly workflow; reuse the same per-driver workflows there.

Minor changes

1. The YAML code is formatted by the rules of this YAML formatter. Excessive double quotes have been removed. Single quotes are used where necessary.
2. The oci8 and pdo_oci have been combined in a single one with the extension parameter. This is consistent with the rest of the jobs.
3. The dependency parameter has been renamed to dependency-versions to match the one from ramsey/composer-install
4. The ibm-db2 job has been renamed to db2 (the product name is Db2); the mssql one has been renamed to sqlserver (this is quite common and matches the platform name).
5. The "libsqlite" in the job output has been replaced with "SQLite" since there doesn't seem to be such a thing as "libsqlite".
6. The format of the code coverage file name has been made more consistent across jobs.
7. The "Create temporary tablespace" step has been moved closer to "Run PHPUnit". This will reduce the likelihood of the job failing because the tablespace is created too early. This may be unnecessary but I saw this failure once even after Revert IBM Db2 health check improvement #6859.

TODO

• Refactor the rest of the jobs
• After the merge: update Building the CI Build Matrix #6620

[greg0ire]

👌

[stof]

should this use the nightly keyword to reduce maintenance work for that workflow ?

[morozov]

If that's the same, yes.

[stof]

the difference is that nightly will automatically mean PHP 8.6 after the release of PHP 8.5.0 (it always refers to the master branch of PHP).

Actually, 8.5 currently installs the nightly PHP version as 8.5 is not released yet: https://github.com/shivammathur/setup-php?tab=readme-ov-file#tada-php-support

to me, nightly is exactly the intent we want in this nightly.yml job, to avoid having to remember to update it every year.

[morozov]

Yeah, that was my understanding. Using nightly sounds good. It's more expressive and requires less maintenance.