Update installation tests with 6.1.1 version (#2682)

#### Reference Issues/PRs
<!--Example: Fixes #1234. See also #3456.-->

#### What does this implement or fix?

Run on 6.1.1.
https://github.com/man-group/ArcticDB/actions/runs/18158369765

#### Any other comments?

#### Checklist

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

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Co-authored-by: Georgi Rusev <Georgi Rusev>

Author: grusev

.github/workflows/installation_tests.yml

@@ -29,6 +29,7 @@ on:
         type: choice
         options:
           - "latest"
+          - "6.1.1"
           - "5.9.3"
           - "5.8.0"
           - "5.7.0"
@@ -155,8 +156,9 @@ jobs:
           "08") echo "arcticdb_version=5.6.0" >> $GITHUB_ENV;;
           "09") echo "arcticdb_version=5.7.0" >> $GITHUB_ENV;;
           "10") echo "arcticdb_version=5.8.0" >> $GITHUB_ENV;;
-          "12") echo "arcticdb_version=5.9.3" >> $GITHUB_ENV;;
-          "11") echo "arcticdb_version=latest" >> $GITHUB_ENV;;
+          "11") echo "arcticdb_version=5.9.3" >> $GITHUB_ENV;;
+          "12") echo "arcticdb_version=6.1.1" >> $GITHUB_ENV;;
+          "13") echo "arcticdb_version=latest" >> $GITHUB_ENV;;
         esac        
 
     - name: Checkout code

python/tests/compat/requirements-6.1.1.txt

@@ -0,0 +1,4 @@
+arcticdb==6.1.1
+numpy
+pyarrow
+protobuf<7

python/tests/compat/requirements-6.1.1.yml

@@ -0,0 +1,8 @@
+name: arcticdb
+channels:
+  - conda-forge
+dependencies:
+  - arcticdb==6.1.1
+  - numpy
+  - pyarrow
+  - protobuf