Refactor(eos_cli_config_gen,eos_designs): Remove multiple H1 headings

[JulioPDX]

Change Summary

This PR removes the duplicate H1 headings in device and fabric documentation.

Related Issue(s)

Fixes #1748

Component(s) name

arista.avd.eos_cli_config_gen

arista.avd.eos_designs

Proposed changes

• Update Jinja templates to increase by 1
• Corrected spacing between headings/TOC separation from main heading
• Updated add_md_toc.py toc_levels to default of 3 (retains TOC view)

How to test

See updated artifacts

Checklist

Repository Checklist

• My code has been rebased from devel before I start
• I have read the CONTRIBUTING document.
• My change requires a change to the documentation and documentation have been updated accordingly.
• I have updated molecule CI testing accordingly. (check the box if not applicable)

[ClausHolbechArista]

This one was hard to review :)
I wanted to ensure that only headings changed and no TOCs changed - proving that you caught every single heading, since TOC would have caught it otherwise. So I had to get some help from egrep:

holbech@holbech:~/ansible-avd/ansible_collections/arista/avd$ git diff devel | egrep '^[+-]' | egrep -v '^[+-]#' | egrep -v '^[+-]{3}' | egrep -v '^[+-]\ *$'
- ### SSH timeout and management
+ #### SSH timeout and management
- ### SSH timeout and management
+ #### SSH timeout and management
- ### SSH timeout and management
+ #### SSH timeout and management
- ### SSH timeout and management
+ #### SSH timeout and management
- ### SSH timeout and management
+ #### SSH timeout and management
- ### SSH timeout and management
+ #### SSH timeout and management
-def add_md_toc(md_input, skip_lines=0, toc_levels=2, toc_marker="<!-- toc -->"):
+def add_md_toc(md_input, skip_lines=0, toc_levels=3, toc_marker="<!-- toc -->"):
-        How many levels of headings will be included in the TOC (Default:2)
-        default: 2
+        How many levels of headings will be included in the TOC (Default:3)
+        default: 3

I have highlighted the space I think causes the heading for SSH timeout and management to be indented.
Please also update the documentation for add_md_toc in README.md

fixed

[carlbuchmann]

LGTM