Improve Nethermind executable rename handling

[rubo]

Changes

Added symlinks for Docker files and macOS to support the old Nethermind.Runner name

Types of changes

What types of changes does your code introduce?

• Bugfix (a non-breaking change that fixes an issue)
• New feature (a non-breaking change that adds functionality)
• Breaking change (a change that causes existing functionality not to work as expected)
• Optimization
• Refactoring
• Documentation update
• Build-related changes
• Other: Description

Testing

Requires testing

• Yes
• No

If yes, did you write tests?

• Yes
• No

Notes on testing

Tested manually.

Documentation

Requires documentation update

• Yes
• No

Requires explanation in Release Notes

• Yes
• No

Remarks

This is an improvement for the Nethermind executable rename introduced in #5908 and addresses the cases where users use the old entrypoint when deriving from Nethermind Docker file.

[LukaszRozmej]

Could you add explanation why this is needed?

[rubo]

@LukaszRozmej Added in remarks