[MIG] Migrate to v14

[SodexisTeam]

Created PR to make it work for v14 migration.
We added the changes in OCA#150 to make it green
@stephankeller @dreispt @dnplkndll

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (Kencove-14.0-mig-account_avatax_sale@c08c260). Click here to learn what that means.
The diff coverage is n/a.

@@                           Coverage Diff                           @@
##             Kencove-14.0-mig-account_avatax_sale       #2   +/-   ##
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  Coverage                                        ?   32.52%           
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  Files                                           ?       14           
  Lines                                           ?      781           
  Branches                                        ?        0           
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  Hits                                            ?      254           
  Misses                                          ?      527           
  Partials                                        ?        0           

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[odoo-sh]

@max3903 here is the PR

[atchuthan]

@max3903 done with minor changes in CREDITS.rst