Fix Ansible 12 double-templating and Jinja2 spacing issues (#14836)

* Fix Ansible 12 double-templating and Jinja2 spacing issues

This PR fixes critical deployment issues and improves code consistency for Ansible 12 compatibility.

## Fixed Issues

### 1. Double-templating bug (Issue #14835)
Fixed 7 instances of invalid double-templating that breaks deployments:
- Changed `{{ lookup('file', '{{ var }}') }}` to `{{ lookup('file', var) }}`
- Affects Azure, DigitalOcean, GCE, Linode, and IPsec configurations
- Added comprehensive test to prevent regression

### 2. Jinja2 spacing inconsistencies
Fixed 33+ spacing issues for better code quality:
- Removed spaces between Jinja2 blocks: `}} {%` → `}}{%`
- Fixed operator spacing: `int -1` → `int - 1`
- Fixed filter spacing: `|b64encode` → `| b64encode`
- Consolidated multiline expressions to single lines

### 3. Test suite improvements
Enhanced boolean type checking test to be more targeted:
- Excludes external dependencies and CloudFormation templates
- Only tests Algo's actual codebase
- Verified with mutation testing
- Added comprehensive documentation

## Testing
- All 87 unit tests pass
- 0 Jinja2 spacing issues remaining (verified by ansible-lint)
- Ansible syntax checks pass for all playbooks
- Mutation testing confirms tests catch real issues

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Fix Python linting issue

- Remove unnecessary f-string prefix where no placeholders are used
- Fixes ruff F541 error

* Fix line length linting issues

- Break long lines to stay within 120 character limit
- Extract variables for better readability
- Fixes ruff E501 errors

---------

Co-authored-by: Claude <noreply@anthropic.com>

server.yml

@@ -235,7 +235,7 @@
                   - "{{ congrats.common.split('\n') }}"
                   - "    {{ congrats.p12_pass if algo_ssh_tunneling or ipsec_enabled else '' }}"
                   - "    {{ congrats.ca_key_pass if algo_store_pki and ipsec_enabled else '' }}"
-                  - "    {{ congrats.ssh_access if algo_provider != 'local' else ''}}"
+                  - "    {{ congrats.ssh_access if algo_provider != 'local' else '' }}"
           tags: always
       rescue:
         - include_tasks: playbooks/rescue.yml