Add ratelimiter for fault injection handlers

[harishxr]

Summary

This PR adds a tollbooth ratelimiter to the Fault Injection handlers, enforcing a request limit to control how frequently fault injection operations can be triggered.

Implementation details

• createRateLimiter is used to create a new tollbooth rate limiter with rate limit of 0.2 ( 1 request per 5 seconds).
• The rate limiter is then applied to network fault injection endpoints such as blackhole port faults, latency faults and packet loss faults.

Testing

• Agent with these changes was built and a standard task was launched using the agent with rate limiter.
• Accessed the task container and called the Fault Injection APIs back to back

# curl -X GET $ECS_AGENT_URI/fault/v1/network-blackhole-port -d '{"Port":123}' -v
*   Trying 169.254.170.2:80...
* Connected to 169.254.170.2 (169.254.170.2) port 80 (#0)
> GET /api/4e37f57c-c1c8-48ca-927f-0662dfa78094/fault/v1/network-blackhole-port HTTP/1.1
> Host: 169.254.170.2
> User-Agent: curl/7.88.1
> Accept: */*
> Content-Length: 12
> Content-Type: application/x-www-form-urlencoded
> 
< HTTP/1.1 400 Bad Request
< Content-Type: application/json
< X-Rate-Limit-Duration: 1
< X-Rate-Limit-Duration: 1
< X-Rate-Limit-Limit: 40.00
< X-Rate-Limit-Limit: 0.20
< X-Rate-Limit-Request-Forwarded-For: 
< X-Rate-Limit-Request-Forwarded-For: 
< X-Rate-Limit-Request-Remote-Addr: 172.17.0.2:35562
< X-Rate-Limit-Request-Remote-Addr: 172.17.0.2:35562
< Date: Mon, 16 Sep 2024 18:20:41 GMT
< Content-Length: 50
< 
* Connection #0 to host 169.254.170.2 left intact
{"Error":"required parameter Protocol is missing"}
# curl -X GET $ECS_AGENT_URI/fault/v1/network-blackhole-port -d '{"Port":123}' -v
*   Trying 169.254.170.2:80...
* Connected to 169.254.170.2 (169.254.170.2) port 80 (#0)
> GET /api/4e37f57c-c1c8-48ca-927f-0662dfa78094/fault/v1/network-blackhole-port HTTP/1.1
> Host: 169.254.170.2
> User-Agent: curl/7.88.1
> Accept: */*
> Content-Length: 12
> Content-Type: application/x-www-form-urlencoded
> 
< HTTP/1.1 429 Too Many Requests
< Content-Type: text/plain; charset=utf-8
< X-Rate-Limit-Duration: 1
< X-Rate-Limit-Duration: 1
< X-Rate-Limit-Limit: 40.00
< X-Rate-Limit-Limit: 0.20
< X-Rate-Limit-Request-Forwarded-For: 
< X-Rate-Limit-Request-Forwarded-For: 
< X-Rate-Limit-Request-Remote-Addr: 172.17.0.2:35568
< X-Rate-Limit-Request-Remote-Addr: 172.17.0.2:35568
< Date: Mon, 16 Sep 2024 18:20:43 GMT
< Content-Length: 38
< 
* Connection #0 to host 169.254.170.2 left intact
You have reached maximum request limit

• As seen from the test results, the second request done in succession get blocked with a 429 error.
• New TestRateLimiterIntegration integration test has been added as well to ensure the rate limiter works as expected.

New tests cover the changes: yes

Description for the changelog

Add ratelimiter for fault injection handlers

Additional Information

Does this PR include breaking model changes? If so, Have you added transformation functions?

Does this PR include the addition of new environment variables in the README?

Licensing

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.