deprecate Ansible 2.9 and ansible-base 2.10

[briantist]

SUMMARY

This PR announces the deprecation of Ansible 2.9 and ansible-base 2.10 support.

Related:

• Support for Ansible 2.9 and ansible-base 2.10 will be dropped in version 3.0.0 #189
• Community collections: when to drop support for Ansible 2.9 and ansible-base 2.10? ansible-community/community-topics#50

[briantist]

recheck

[codecov]

Codecov Report

Merging #190 (cae8f5b) into main (261f7b1) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #190   +/-   ##
=======================================
  Coverage   91.69%   91.69%           
=======================================
  Files          40       40           
  Lines        1589     1589           
  Branches      122      122           
=======================================
  Hits         1457     1457           
  Misses        119      119           
  Partials       13       13           

Flag	Coverage Δ
env_docker-default	91.69% <ø> (ø)
integration	75.59% <ø> (ø)
sanity	37.65% <ø> (ø)
target_ansible-doc	100.00% <ø> (ø)
target_auth_approle	89.47% <ø> (ø)
target_auth_cert	56.20% <ø> (ø)
target_auth_jwt	91.30% <ø> (ø)
target_auth_none	100.00% <ø> (ø)
target_auth_token	71.42% <ø> (ø)
target_connection_options	74.76% <ø> (ø)
target_controller	66.62% <ø> (ø)
target_import	37.65% <ø> (ø)
target_lookup_hashi_vault	81.33% <ø> (ø)
target_lookup_vault_read	90.00% <ø> (ø)
target_module_utils	90.17% <ø> (ø)
target_module_vault_read	92.10% <ø> (ø)
units	88.79% <ø> (ø)

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