Update libssl-dev package in Dockerfiles to reflect package updates.

[MartinWheelerMT]

What

• Update libssl-dev package in Dockerfiles to reflect package updates.
• Add line to remove previous test runner results when running new tests to build and run tests scripts.

Why

Running the test scripts now reports an error:

ibssl-dev : Depends: libssl3 (= 3.0.18-1~deb12u1) but 3.0.18-1~deb12u2 is to be installed

This needs to be updated across the Dockerfiles to reflect this.

Also added a line which removes previous run test results when a test is run again, to ensure that a large amount of results files are not accidentally retained.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Internal change (non-breaking change with no effect on the functionality affecting end users)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I have performed a self-review of my code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have updated the Changelog with details of my change in the UNRELEASED section if this change will affect end users