We abandoned cutting releases for this project, since it is not used by
any downstream projects other than the main OpenAssetIO repo's CI tests,
which always checks out `main` of this repo anyway.

So just remove the release notes to reduce maintenance burden.

Signed-off-by: David Feltell <[email protected]>

Part of OpenAssetIO/OpenAssetIO#1351.

Remove support for changing the libstdc++ ABI version, since that was
only necessary to support CY22.

The updated `openassetio-build` Docker image conforms to CY24. So update
usages of other `aswf` images to also conform to CY24.

Remove workarounds for GitHub NodeJS version 20 default causing glibc
incompatibilities with CY22 based containers, now that the image has
been updated to CY24.

Signed-off-by: David Feltell <[email protected]>

Part of OpenAssetIO/OpenAssetIO#1351. Now that the `openassetio-build`
container can support nodejs 20 (because glibc is new enough) we can
update `actions/checkout`.

This was an attempt to fix an error in GitHub CI

```
fatal: detected dubious ownership in repository at '/__w/OpenAssetIO-Test-CMake/OpenAssetIO-Test-CMake'
```

But it didn't work. See subsequent commit for workaround.

Signed-off-by: David Feltell <[email protected]>

Part of OpenAssetIO/OpenAssetIO#1351. A recent change to git has
exposed a bug in actions/checkout

Signed-off-by: David Feltell <[email protected]>