Fix(eos_designs): change speed group value from int to str

[philippebureau]

Change Summary

Change eos_desings platform speed group and eos_cli_config_gen hardware speed group key expected value to string and convert int to str if needed

Related Issue(s)

N/A

Component(s) name

arista.avd.eos_desings
arista.avd.eos_cli_config_gen

Proposed changes

the current implementation expect a integer which does not work for chassis since the value of the speed group use a "/" in the value (ex: 3/5 for linecard 3 group 5)

by inverting the current to expect a string and convert integer to string fixes the issue

How to test

create a speed group in eos_desings or eos_cli_config_gen with string and integer values

Checklist

User Checklist

• N/A

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)

[carlbuchmann]

LGTM

[chetryan]

LGTM!