feat: Allow debug mock server in compatibility suites

[tienvx]

Currently running compatibility suites tests doesn't print out any mock server's log messages. So it's hard to debug failed test like this:

Then a 200 success response is returned
      Failed asserting that 500 is identical to 200.

And there is no way to customize this.

This PR pass the PACT_LOGLEVEL env to mock server. It allow me to run the behat command with custom (mock server) debug level:

env PACT_LOGLEVEL=debug vendor/bin/behat compatibility-suite/pact-compatibility-suite/features/V1/http_consumer.feature:204 --colors

Then it will print out useful log messages from mock server like this:

...
2024-08-29T05:41:00.882246Z DEBUG tokio-runtime-worker pact_matching: --> Mismatches: [HeaderMismatch { key: "Content-Type", expected: "text/plain", actual: "application/x-www-form-urlencoded", mismatch: "Mismatch with header 'Content-Type': Expected header 'Content-Type' to have value 'text/plain' but was 'application/x-www-form-urlencoded'" }, BodyTypeMismatch { expected: "text/plain", actual: "application/x-www-form-urlencoded", mismatch: "Expected a body of 'text/plain' but the actual content type was 'application/x-www-form-urlencoded'", expected_body: Some(b"a=1&b=2&c=3&d=4"), actual_body: Some(b"a=1&b=2&c=3&d=4") }]
2024-08-29T05:41:00.882281Z DEBUG tokio-runtime-worker pact_mock_server::hyper_server: Request did not match: Request did not match - HTTP Request ( method: PUT, path: /form, query: None, headers: Some({"Content-Type": ["text/plain"]}), body: Present(15 bytes) )    0) Mismatch with header 'Content-Type': Expected header 'Content-Type' to have value 'text/plain' but was 'application/x-www-form-urlencoded'    1) Expected a body of 'text/plain' but the actual content type was 'application/x-www-form-urlencoded'
...

If PACT_LOGLEVEL is not set, it will not print anything, just like before.

[coveralls]

Pull Request Test Coverage Report for Build 10609536084

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 97.313%

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Totals
Change from base Build 10370970040:	0.0%
Covered Lines:	2282
Relevant Lines:	2345

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