mysql_replication: remove mode values and ret values containing master / slave

[Andersson007]

SUMMARY

Relates to
#145
#147
#150
#97

Will be release as a breaking change with 3.0.0

[codecov]

Codecov Report

Merging #252 (75a9321) into main (d411a8e) will increase coverage by 0.44%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##             main     #252      +/-   ##
==========================================
+ Coverage   77.99%   78.44%   +0.44%     
==========================================
  Files          24       24              
  Lines        2159     2134      -25     
  Branches      508      498      -10     
==========================================
- Hits         1684     1674      -10     
+ Misses        309      301       -8     
+ Partials      166      159       -7     

Impacted Files	Coverage Δ
plugins/modules/mysql_replication.py	68.37% <66.66%> (+2.55%)	⬆️

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[Andersson007]

cc @Jorge-Rodriguez @bmalynovytch @rsicart

[Jorge-Rodriguez]

LGTM
Should we test for expected failures when using the old terminology?

[Andersson007]

LGTM Should we test for expected failures when using the old terminology?

Good question

[Andersson007]

@Jorge-Rodriguez the tests have been added (the more tests the alwaysbetter), thanks:)

[Andersson007]

@Jorge-Rodriguez thanks for reviewing!

[nerijus]

Now it does not work with mariadb versions <10.5, for example, 10.4.
If I use slave_pos:

value of primary_use_gtid must be one of: current_pos, replica_pos, disabled, got: slave_pos

If I use replica_pos:

(1064, "You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'replica_pos' at line 1")

[Andersson007]

@nerijus , working on this, thanks!