Refactor password recovery mutations

[fowczarek]

I want to merge this change because resolve #4153

Screenshots

Pull Request Checklist

1. Privileged views and APIs are guarded by proper permission checks.
2. All visible strings are translated with proper context.
3. All data-formatting is locale-aware (dates, numbers, and so on).
4. Database queries are optimized and the number of queries is constant.
5. Database migration files are up to date.
6. The changes are tested.
7. GraphQL schema and type definitions are up to date.
8. Changes are mentioned in the changelog.

[django-queries]

Here is the report for 0331a93 (mirumee/saleor @ 4153/Reactor_password_recovery_mutations)
Base comparison is 1943069.

No differences were found. (click me)

# api.benchmark checkout
  test name                           	left count 	right count	duplicate count
  ------------------------------------	-----------	-----------	---------------
  add billing address to checkout     	         34	         34	             20
  add shipping to checkout            	          7	          7	              0
  checkout payment charge             	         14	         14	              0
  complete checkout                   	          6	          6	              0
  create checkout                     	         48	         48	             24

# api.benchmark homepage
  test name                           	left count 	right count	duplicate count
  ------------------------------------	-----------	-----------	---------------
  retrieve main menu                  	          5	          5	              0
  retrieve product list               	          4	          4	              0
  retrieve secondary menu             	          5	          5	              0
  retrieve shop                       	          2	          2	              0

# api.benchmark product
  test name                           	left count 	right count	duplicate count
  ------------------------------------	-----------	-----------	---------------
  product details                     	         13	         13	              3

# api.benchmark variant
  test name                           	left count 	right count	duplicate count
  ------------------------------------	-----------	-----------	---------------
  retrieve variant list               	         15	         15	              8

[codecov]

Codecov Report

Merging #4617 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #4617      +/-   ##
==========================================
- Coverage   91.25%   91.25%   -0.01%     
==========================================
  Files         301      301              
  Lines       17970    17979       +9     
  Branches     1788     1788              
==========================================
+ Hits        16399    16406       +7     
- Misses       1071     1072       +1     
- Partials      500      501       +1

Impacted Files	Coverage Δ
saleor/graphql/account/mutations/base.py	98.12% <100%> (+0.11%)	⬆️
saleor/payment/utils.py	90.47% <0%> (-0.87%)	⬇️

---

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[codecov]

Codecov Report

Merging #4617 into master will increase coverage by 0.01%.
The diff coverage is 97.01%.

@@            Coverage Diff             @@
##           master    #4617      +/-   ##
==========================================
+ Coverage   91.36%   91.37%   +0.01%     
==========================================
  Files         307      308       +1     
  Lines       18197    18235      +38     
  Branches     1813     1814       +1     
==========================================
+ Hits        16625    16663      +38     
- Misses       1057     1058       +1     
+ Partials      515      514       -1

Impacted Files	Coverage Δ
saleor/graphql/account/mutations/base.py	98.12% <100%> (+0.11%)	⬆️
...leor/graphql/account/mutations/deprecated_staff.py	100% <100%> (ø)	⬆️
...or/graphql/account/mutations/deprecated_account.py	100% <100%> (ø)	⬆️
saleor/account/emails.py	86.2% <100%> (+8.42%)	⬆️
saleor/core/utils/url.py	81.81% <81.81%> (ø)
saleor/payment/utils.py	91.34% <0%> (+0.86%)	⬆️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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