chore: dropped pub fields from config module

[Rutik7066]

Summary:
chore: dropped pub fields from config module

Issue Reference(s):
Fixes #2256 /claim #2256 Build & Testing:

• [x] I ran cargo test successfully.
• [x] 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>

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 87.09677% with 8 lines in your changes missing coverage. Please review.

Project coverage is 85.70%. Comparing base (f1d8feb) to head (05cf779).

Files	Patch %	Lines
src/cli/tc.rs	0.00%	6 Missing :warning:
tailcall-aws-lambda/src/main.rs	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2261 +/- ## ========================================== - Coverage 85.71% 85.70% -0.01% ========================================== Files 219 219 Lines 21037 21047 +10 ========================================== + Hits 18031 18039 +8 - Misses 3006 3008 +2 ```

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[github-actions[bot]]

Bencher

Report	Sun, June 23, 2024 at 12:23:07 UTC
Project	tailcall
Branch	2261/merge
Testbed	benchmarking-runner

Click to view all benchmark results

Benchmark	Latency	Latency Results nanoseconds (ns) | (Δ%)	Latency Upper Boundary nanoseconds (ns) | (%)
from_json_bench	✅ (view plot)	7,214,400.00 (+1.25%)	7,258,797.36 (99.39%)
group_by	✅ (view plot)	545.22 (-4.26%)	637.24 (85.56%)
input/args.missing	✅ (view plot)	24.97 (+3.55%)	27.39 (91.16%)
input/args.nested.existing	✅ (view plot)	52.88 (+10.72%)	62.14 (85.09%)
input/args.nested.missing	✅ (view plot)	36.68 (-3.69%)	40.92 (89.63%)
input/args.root	✅ (view plot)	50.93 (+15.23%)	59.36 (85.80%)
input/headers.existing	✅ (view plot)	32.24 (+1.93%)	33.79 (95.42%)
input/headers.missing	✅ (view plot)	31.60 (+2.87%)	33.62 (94.00%)
input/value.missing	✅ (view plot)	23.17 (-1.17%)	25.00 (92.69%)
input/value.nested.existing	✅ (view plot)	41.06 (-1.16%)	45.07 (91.10%)
input/value.nested.missing	✅ (view plot)	34.65 (-5.27%)	38.69 (89.56%)
input/value.root	✅ (view plot)	37.35 (-1.96%)	41.59 (89.80%)
input/vars.existing	✅ (view plot)	8.17 (+4.66%)	8.94 (91.43%)
input/vars.missing	✅ (view plot)	11.35 (+15.62%)	13.29 (85.37%)
synth_nested	✅ (view plot)	21,156.00 (+0.35%)	21,857.10 (96.79%)
test_batched_body	✅ (view plot)	2,550.30 (-99.28%)	1,791,281.98 (0.14%)
test_batched_body #2	✅ (view plot)	1,703,100.00 (+0.07%)	1,825,646.11 (93.29%)
test_data_loader	✅ (view plot)	470,730.00 (+0.33%)	486,068.19 (96.84%)
test_handle_request	✅ (view plot)	154,420.00 (-1.23%)	172,331.71 (89.61%)
test_http_execute_method	✅ (view plot)	17,692.00 (-2.77%)	19,290.69 (91.71%)
with_mustache_expressions	✅ (view plot)	1,149.50 (-1.45%)	1,230.92 (93.39%)
with_mustache_literal	✅ (view plot)	743.56 (+3.05%)	775.74 (95.85%)

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[tusharmath]

Copy of the PR here — https://github.com/tailcallhq/tailcall/pull/2260/commits