[Rust][Server] Upgrade to tokio v1

[sransara]

This PR upgrades rust-server generated code to use tokio v1.

• tokio from 0.2 to 1.14
• hyper from 0.13 to 0.14
• hyper-tls from 0.4 to 0.5
• hyper-openssl from 0.8 to 0.9
• swagger-rs from 5.0.2 to 6.1

These upgrades are done in combination because they are cross-dependent upon each other, for example hyper depends on tokio 1.0 or higher.

This PR is a spiritual successor to (also based off the branch):

• [Rust][Server] Upgrade hyper from 0.13 to 0.14, swagger-rs and tokio #11041

PR checklist

• Read the contribution guidelines.
• Pull Request title clearly describes the work in the pull request and Pull Request description provides details about how to validate the work. Missing information here may result in delayed response from the community.
• Run the following to build the project and update samples:

  ./mvnw clean package 
  ./bin/generate-samples.sh
  ./bin/utils/export_docs_generators.sh
  

  Commit all changed files.
  This is important, as CI jobs will verify all generator outputs of your HEAD commit as it would merge with master.
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• File the PR against the correct branch: master (5.3.0), 6.0.x
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[farcaller]

Looks like some nice simplifications overall and version bumps are always welcome. Good stuff, thanks for your contribution!

[wing328]

Thanks for the PR. i tested the change locally but got

   Compiling ops-v3 v0.0.1 (/Users/williamcheng/Code/openapi-generator/samples/server/petstore/rust-server/output/ops-v3)
error[E0412]: cannot find type `HttpsConnector` in this scope
   --> output/openapi-v3/src/server/callbacks.rs:131:57
    |
126 | type HttpConnector = hyper_tls::HttpsConnector<hyper::client::HttpConnector>;
    | ----------------------------------------------------------------------------- similarly named type alias `HttpConnector` defined here
...
131 | impl<C> Client<DropContextService<hyper::client::Client<HttpsConnector, Body>, C>, C> where
    |                                                         ^^^^^^^^^^^^^^
    |
help: a type alias with a similar name exists
    |
131 | impl<C> Client<DropContextService<hyper::client::Client<HttpConnector, Body>, C>, C> where
    |                                                         ~~~~~~~~~~~~~
help: consider importing one of these items
    |
1   | use crate::client::HttpsConnector;
    |
1   | use hyper_tls::HttpsConnector;
    |

warning: field is never read: `nullable_thing`
  --> output/rust-server-test/src/models.rs:60:13
   |
60 |             pub nullable_thing: Vec<String>,
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `#[warn(dead_code)]` on by default

warning: field is never read: `required_nullable_thing`
  --> output/rust-server-test/src/models.rs:61:13
   |
61 |             pub required_nullable_thing: Vec<String>,
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

For more information about this error, try `rustc --explain E0412`.

To repeat the issue, please run mvn integration-test -f samples/server/petstore/rust-server/pom.xml.

Please take a look when you've time. Thank you.

[sransara]

Thanks for taking a look. I was able to replicate and solve the issue by cross compiling for non-linux target OS. Can you please try again with the latest version?

It flew under the radar because I'm testing on a Linux machine and some packages are dependent on the OS. I was able to build by cross compiling for Windows (x86_64-pc-windows-gnu) but I'm unable to test the run executable. So any help would be appreciated.

[wing328]

All tests passed locally:

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

   Doc-tests ops-v3

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

   Doc-tests petstore-with-fake-endpoints-models-for-testing

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

   Doc-tests ping-bearer-auth

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

   Doc-tests rust-server-test

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  04:28 min
[INFO] Finished at: 2022-03-16T15:27:02+08:00
[INFO] ------------------------------------------------------------------------