[NRL-1922] Fix up some Sonarqube issues

[mattdean3-nhs]

Following on from our Sonarqube project reset, a bunch of issues have been uncovered.

This PR fixes the following issues:

• Global permissions in workflows
• Broken regexes in dynamodb model
• Use [[ instead of [ for conditions in shell scripts
• Use Python language features instead of old Python classes
• Remove hardcoded AWS regions in boto-based scripts (use env instead)
• Remove old legacy changelog files
• Add NOSONAR exclusion in code instead of exceptions in Sonarcloud
• Mop up remaining lows and info-level issues
• Sonar config issues

[github-actions]

🚀 PR environment successfully deployed.
Commit Hash: 98af011389934e302f52cc7d49daecd291d3bc6d
URL: https://nrl1922-01ba47.api.record-locator.dev.national.nhs.uk/

[github-actions]

🚀 PR environment successfully deployed.
Commit Hash: be61f3f7f0650392408b89c492ef75d82226a9d9
URL: https://nrl1922-01ba47.api.record-locator.dev.national.nhs.uk/

[github-actions]

🚀 PR environment successfully deployed.
Commit Hash: 0fb2969cf8fe07e312adf46430977021e7c8be66
URL: https://nrl1922-01ba47.api.record-locator.dev.national.nhs.uk/

[github-actions]

🚀 PR environment successfully deployed.
Commit Hash: 5842fde2fe50c86b229d2cc3a9579ec970aa4553
URL: https://nrl1922-01ba47.api.record-locator.dev.national.nhs.uk/

[github-actions]

🚀 PR environment successfully deployed.
Commit Hash: ab1474e004080e074d859a22620af48e075337d2
URL: https://nrl1922-01ba47.api.record-locator.dev.national.nhs.uk/

[github-actions]

🚀 PR environment successfully deployed.
Commit Hash: 146523a6ac416f57ee4f0a14c6701517f057861a
URL: https://nrl1922-01ba47.api.record-locator.dev.national.nhs.uk/

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.8% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

🚀 PR environment successfully deployed.
Commit Hash: 7649657a079e2c108fe6afda443f2976a0b4b4b2
URL: https://nrl1922-01ba47.api.record-locator.dev.national.nhs.uk/