Remove SemVer version validation as it doesnt support version strings…

… such as 1.6.1rc0 (#678)

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#### What does this implement/fix? How does it work (high level)?
Highlight notable design decisions.

#### Any other comments?

We could replace this with conda version validation (from the `conda`
package) or packaging version validation (from the `packaging` package)
but both are a little fiddly.

To be honest this has to be approved before having an irreversible
effect, so I think human validation is fine here.

#### Checklist

<details>
  <summary>
   Checklist for code changes...
  </summary>
 
 - [x] Have you updated the relevant docstrings and documentation?
- [x] Is this contribution tested against [all ArcticDB's
features](../docs/mkdocs/docs/technical/contributing.md)?
- [x] Do all exceptions introduced raise appropriate [error
messages](https://docs.arcticdb.io/error_messages/)?
 - [x] Are API changes highlighted in the PR description?
- [x] Is the PR labelled as enhancement or bug so it appears in
autogenerated release notes?
</details>

.github/workflows/tag.yml

@@ -5,10 +5,6 @@ on:
  version:
  type: string
  required: true
- bump:
- description: Bump branch to the next version
- type: choice
- options: ["No", minor, patch, prerelease, build] # Major must be changed by hand
  overwrite:
  description: Force push tag
  type: boolean
@@ -35,11 +31,6 @@ jobs:
  git push origin HEAD:$3 $4
  }
  steps:
- - name: Validate
- run: |
- pip3 install semver>=3
- python3 -m semver check '${{inputs.version}}'
-
  - name: Checkout
  uses: actions/checkout@v3.3.0
  with:
@@ -53,10 +44,3 @@ jobs:
  # Remove the build status badge from a version tag
  sed -i 's#<img src="https://github.com/man-group/ArcticDB/actions/workflows/build.yml/badge.svg"/>##' README.md || true
  tag_and_push "Tagging" ${{inputs.version}} refs/tags/v${{inputs.version}} ${{inputs.overwrite && '-f' || ''}}
-
- - name: Bump ${{github.ref_name}} to the next version
- if: inputs.bump != 'No'
- run: |
- git switch -C bumping ${{github.ref}}
- new_ver=`python3 -m semver bump ${{inputs.bump}} '${{inputs.version}}'`
- tag_and_push "Bumping to" $new_ver ${{github.ref}}