perf: improve http cache performance

[ranjitmahadik]

Summary:

• created separate workspace, tailcall-http-cache which contains the optimised cache manager.
• bench results:
  before: [38.054 µs 38.204 µs 38.428 µs]
  after: [18.419 µs 18.432 µs 18.449 µs]
  performance improvement : 51%.

Issue Reference(s):
Related #1852

Build & Testing:

• I ran cargo test successfully.
• I have run ./lint.sh --mode=fix to fix all linting issues raised by ./lint.sh --mode=check.

Checklist:

• I have added relevant unit & integration tests.
• I have updated the documentation accordingly.
• I have performed a self-review of my code.
• PR follows the naming convention of <type>(<optional scope>): <title>