feat(router): AWS Sigv4

[ardatan]

Ref ROUTER-123
Similar to https://www.apollographql.com/docs/graphos/routing/security/subgraph-authentication#:~:text=The%20GraphOS%20Router%20and%20Apollo,hasn't%20been%20tampered%20with.

AWS's official SDK was too complex. I used https://github.com/apache/opendal-reqsign of Apache which supports other cloud providers, too. In the future, we can add support for these too, maybe?

Documentation -> graphql-hive/console#7235

[github-actions]

✅ k6-benchmark results

     ✓ response code was 200
     ✓ no graphql errors
     ✓ valid response structure

     █ setup

     checks.........................: 100.00% ✓ 207303      ✗ 0    
     data_received..................: 6.1 GB  202 MB/s
     data_sent......................: 81 MB   2.7 MB/s
     http_req_blocked...............: avg=2.95µs   min=692ns   med=1.85µs  max=4.16ms   p(90)=2.64µs  p(95)=3.04µs  
     http_req_connecting............: avg=317ns    min=0s      med=0s      max=1.26ms   p(90)=0s      p(95)=0s      
     http_req_duration..............: avg=21.23ms  min=2.32ms  med=20.23ms max=110.94ms p(90)=28.97ms p(95)=32.2ms  
       { expected_response:true }...: avg=21.23ms  min=2.32ms  med=20.23ms max=110.94ms p(90)=28.97ms p(95)=32.2ms  
     http_req_failed................: 0.00%   ✓ 0           ✗ 69121
     http_req_receiving.............: avg=146.14µs min=25.66µs med=40.68µs max=76.45ms  p(90)=90.96µs p(95)=430.32µs
     http_req_sending...............: avg=26.44µs  min=5.72µs  med=11µs    max=21.8ms   p(90)=16.2µs  p(95)=28.34µs 
     http_req_tls_handshaking.......: avg=0s       min=0s      med=0s      max=0s       p(90)=0s      p(95)=0s      
     http_req_waiting...............: avg=21.06ms  min=2.26ms  med=20.1ms  max=87.46ms  p(90)=28.7ms  p(95)=31.86ms 
     http_reqs......................: 69121   2298.53937/s
     iteration_duration.............: avg=21.7ms   min=5.52ms  med=20.59ms max=254.34ms p(90)=29.4ms  p(95)=32.65ms 
     iterations.....................: 69101   2297.874293/s
     vus............................: 50      min=50        max=50 
     vus_max........................: 50      min=50        max=50 

[github-actions]

🐋 This PR was built and pushed to the following Docker images:

Image Names: ghcr.io/graphql-hive/router

Platforms: linux/amd64,linux/arm64

Image Tags: ghcr.io/graphql-hive/router:pr-543 ghcr.io/graphql-hive/router:sha-f55e2c2

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[github-actions]

🐋 This PR was built and pushed to the following Docker images:

Image Names: ghcr.io/graphql-hive/router

Platforms: linux/amd64,linux/arm64

Image Tags: ghcr.io/graphql-hive/router:pr-543 ghcr.io/graphql-hive/router:sha-f4c758c

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