Update TestFhirServer initialization

[jestradaMS]

Description

This pull request refactors and improves the robustness of the FHIR server startup and security configuration logic in the end-to-end test suite, and also updates deployment configuration to enhance application warmup behavior. The main focus is on making the test server's availability and metadata retrieval more reliable and maintainable, with clearer retry logic and error handling.

Deployment configuration enhancements:

• Updated default-azuredeploy-docker.json to add new environment variables (WEBSITE_WARMUP_PATH, WEBSITE_WARMUP_STATUSES, and WEBSITES_CONTAINER_START_TIME_LIMIT) to the FHIR server configuration, improving the application's warmup and readiness checks in Azure environments.

Related issues

Addresses AB#181187.

Testing

Tested directly on CI runs and updated the CI environments with the same setting sad defined in this PR to stabilize startup of containers. Verified via app and program logs for the containers.

Describe how this change was tested.

FHIR Team Checklist

• Update the title of the PR to be succinct and less than 65 characters
• Add a milestone to the PR for the sprint that it is merged (i.e. add S47)
• Tag the PR with the type of update: Bug, Build, Dependencies, Enhancement, New-Feature or Documentation
• Tag the PR with Open source, Azure API for FHIR (CosmosDB or common code) or Azure Healthcare APIs (SQL or common code) to specify where this change is intended to be released.
• Tag the PR with Schema Version backward compatible or Schema Version backward incompatible or Schema Version unchanged if this adds or updates Sql script which is/is not backward compatible with the code.
• When changing or adding behavior, if your code modifies the system design or changes design assumptions, please create and include an ADR.
• CI is green before merge
• Review squash-merge requirements

Semver Change (docs)

Patch|Skip|Feature|Breaking (reason)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (main@7b910d0). Learn more about missing BASE report.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5481   +/-   ##
=======================================
  Coverage        ?   76.90%           
=======================================
  Files           ?      978           
  Lines           ?    35680           
  Branches        ?     5356           
=======================================
  Hits            ?    27440           
  Misses          ?     6907           
  Partials        ?     1333           

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.