DCMAW-10829: Enhances http request retry strategy

[jmooney-dd]

​DCMAW-10829

What changed

• sendHttpRequest:
  • Updates retry policy with exponential backoff and full jitter
  • Updates interface to use Result pattern after discussion with Chris
• Updates functions that consume sendHttpRequest as interface has changed:
  • getBiometricToken
  • publicKeyGetter
    • I also updated publicKeyGetter to use the Result pattern here. If we want as minimal changes to publicKeyGetter in this PR as possible, we can revert commit cb1e74c2c47ae5847b9ca6db848c01bebd040a33

Why did it change

Exponential backoff is the preferred strategy when retrying httpRequests

Sonar security hotspot

Link to hotspot

I have commented on the relevant line of code this is regarding. This was lifted directly from STS's backend so I assume it's okay but will ask a for a review

​Evidence

Deployed stack and ran api tests - all passing

Checklists

• There is a ticket raised for this PR that is present in the branch name
• No PII data logged. See guidance here
• Demo to a BA, TA, and the team.
• Update README with any new instructions or tasks

[sonarqubecloud]

Quality Gate failed

Failed conditions
1 Security Hotspot

See analysis details on SonarQube Cloud

[jmooney-dd]

Security hotspot using this 'weak' cryptographic function.

"Make sure that using this pseudorandom number generator is safe here."

Hotspot link

Lifted from STS backend so assume this is fine, we're just using it to calc a httpRequest delay, nothing sensitive.