Remove era|legacy transaction view

[smelc]

Changelog

- description: |
    Remove `era transaction view` and `transaction view` commands. Use `debug transaction view` instead.
# uncomment types applicable to the change:
  type:
  # - feature        # introduces a new feature
  - breaking       # the API has changed in a breaking way
  # - compatible     # the API has changed but is non-breaking
  # - optimisation   # measurable performance improvements
  # - refactoring    # QoL changes
  # - bugfix         # fixes a defect
  # - test           # fixes/modifies tests
  # - maintenance    # not directly related to the code
  # - release        # related to a new release preparation
  # - documentation  # change in code docs, haddocks...

Context

• Follow-up of Make "[era] transaction view" command fail and advice to use "debug transaction view" instead #858
• Fixes Deprecate [era] transaction view #843

How to trust this PR

• It only removes code

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• Self-reviewed the diff

[carbolymer]

LGTM. I'm wondering if it's not too soon.

[smelc]

I'm wondering if it's not too soon.

@Jimbo4350> what do you think?

This can clearly wait a bit more if you feel like it. It's just I like my issues' list to shrink 😄