refactor: Rework http client pool

[gtema]

Using RwLock<HashMap<String, Arc>> inside the provider structure
makes compiler unhappy. Moving it into the separate structure allows
to half the crate compilation time.

[github-actions]

Bencher Report

Branch	client-pool
Testbed	ubuntu-latest

Click to view all benchmark results

Benchmark	Latency	Benchmark Result nanoseconds (ns) (Result Δ%)	Upper Boundary nanoseconds (ns) (Limit %)
fernet token/project	📈 view plot 🚷 view threshold	1,435.50 ns (-1.44%) Baseline: 1,456.48 ns	1,520.47 ns (94.41%)
get_fernet_token_timestamp/project	📈 view plot 🚷 view threshold	153.04 ns (+1.14%) Baseline: 151.32 ns	172.76 ns (88.59%)

🐰 View full continuous benchmarking report in Bencher

[github-actions]

🦢 Load Test Results

Goose Attack Report

Plan Overview

Action	Started	Stopped	Elapsed	Users
Increasing	26-03-20 11:26:31	26-03-20 11:26:33	00:00:02	0 → 4
Maintaining	26-03-20 11:26:33	26-03-20 11:27:03	00:00:30	4
Decreasing	26-03-20 11:27:03	26-03-20 11:27:03	00:00:00	0 ← 4

Request Metrics

Method	Name	# Requests	# Fails	Average (ms)	Min (ms)	Max (ms)	RPS	Failures/s
GET		7547	0	15.39	9	32	251.57	0.00
	Aggregated	7547	0	15.39	9	32	251.57	0.00

Response Time Metrics

Method	Name	50%ile (ms)	60%ile (ms)	70%ile (ms)	80%ile (ms)	90%ile (ms)	95%ile (ms)	99%ile (ms)	100%ile (ms)
GET		13	13	20	21	22	22	24	32
	Aggregated	13	13	20	21	22	22	24	32

Status Code Metrics

Method	Name	Status Codes
GET		7,547 [200]
	Aggregated	7,547 [200]

Transaction Metrics

Transaction	# Times Run	# Fails	Average (ms)	Min (ms)	Max (ms)	RPS	Failures/s
ListUsers
0.0	0	0	0.00	0	0	0.00	0.00
0.1	4792	0	12.05	9	19	159.73	0.00
ValidateToken
1.0	0	0	0.00	0	0	0.00	0.00
1.1	2755	0	21.34	18	32	91.83	0.00
Aggregated	7547	0	15.39	9	32	251.57	0.00

Scenario Metrics

Transaction	# Users	# Times Run	Average (ms)	Min (ms)	Max (ms)	Scenarios/s	Iterations
ListUsers	2	4790	12.05	9	19	159.67	2395.00
ValidateToken	2	2753	21.34	18	32	91.77	1376.50
Aggregated	4	7543	15.44	9	32	251.43	3771.50

Error Metrics

Method	Name	#	Error

View full report