use consistent phone number validation

[sainak]

Proposed Changes

• use regex validator everywhere
• remove phone number field

Associated Issue

• Fixes Missing proper validation for phone number in patient registration form #1243

@coronasafe/code-reviewers

Merge Checklist

• Tests added/fixed
• Update docs in /docs
• Linting Complete

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -0.09 ⚠️

Comparison is base (831c216) 56.66% compared to head (a7c6d8c) 56.57%.

❗ Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the Github App Integration for your organization. Read more.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1308      +/-   ##
==========================================
- Coverage   56.66%   56.57%   -0.09%     
==========================================
  Files         195      194       -1     
  Lines        9861     9836      -25     
  Branches     1655     1651       -4     
==========================================
- Hits         5588     5565      -23     
+ Misses       4219     4218       -1     
+ Partials       54       53       -1     

Impacted Files	Coverage Δ
care/facility/api/serializers/patient.py	55.94% <ø> (-0.58%)	⬇️
care/facility/api/serializers/shifting.py	42.60% <ø> (-0.68%)	⬇️
care/users/api/serializers/user.py	57.89% <ø> (-1.08%)	⬇️

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.