Replace deprecated CLI option `--db-version`

[ckunki]

PTB version 10.0.0 kind of deprecated CLI option --db-version. It seems, that this parameter was never evaluated, maybe.

Still, PTB's templates for the GitHub workflow files contain this option.

Proposal

• Replace this option in the templates for the GitHub workflow files by --itde-db-version
• Additionally, add option --backend onprem, as otherwise the db version option has no effect

Affected file .github/workflows/slow-checks.yml in repositories

• mlflow-plugin
• pytest-exasol-benchmark
• python-extension-common
• mcp-server
• pytest-slc #43 ✅
• script-languages-package-management
• test-db-builder-python
• sqlglot-toolbox

In most cases

• But the integration tests are still executed, but
• Only the concrete version is ignored, in favor of the default version defined by the ITDE.

[ArBridgeman]

I don't know if we should specifically add a value or more let the integration and unit tests pass on additional arguments. That's how it was meant to be in the past (even if the code) didn't properly do that.

As for the db_version, this is supposed to be used with the plugins to aid the integration tests. In 10.x, we'd removed it from the test:unit, as those shouldn't really run DBs. Some of our projects do use it, like PyExasol:

Projects should be able to extend integration tests via the plugins:
https://github.com/exasol/python-toolbox/blob/main/exasol/toolbox/nox/plugin.py#L64

So PyExasol was using this db_version via:
https://github.com/exasol/pyexasol/blob/master/noxconfig.py#L51