[BUG] scala-sttp string interpolation with backticks compiler error

Created by: novakov-alexey-zz

Bug Report Checklist

Have you provided a full/minimal spec to reproduce the issue?
Have you validated the input using an OpenAPI validator (example)?
[ 5.0.0-beta] What's the version of OpenAPI Generator used?
Have you search for related issues/PRs?
What's the actual output vs expected output?
[Optional] Bounty to sponsor the fix (example)

Description

If REST API method parameter is called type with backticks, then Scala compiler fails with:

nifi-client/target/generated-sources/openapi/src/gen/scala/main/org/openapitools/client/api/FlowApi.scala:569: error: invalid string interpolation $`, expected: $$, $identifier or ${expression}
[ERROR]       .method(Method.GET, uri"$baseUrl/flow/processor-types?bundleGroupFilter=$bundleGroupFilter&bundleArtifactFilter=$bundleArtifactFilter&type=$`type`")

Example is taken from NiFi REST API: https://nifi.apache.org/docs/nifi-docs/rest-api/index.html

Expected behavior: code compiles without an y error.

openapi-generator version

OpenAPI declaration file content or url

Command line used for generation

mvn clean install

Steps to reproduce

Use Maven plugin:

<groupId>org.openapitools</groupId>
<artifactId>openapi-generator-maven-plugin</artifactId>
<version>5.0.0-beta</version>

Specify generator as:

<generatorName>scala-sttp</generatorName>

Specify NiFi swagger JSON file
Run mvn clean install

Related issues/PRs

Suggest a fix

Possible solution: wrap Scala keyword like name, i.e. type with curly braces. i.e. generated string must be like this:

.method(Method.GET, uri"$baseUrl/flow/processor-types?bundleGroupFilter=$bundleGroupFilter&bundleArtifactFilter=$bundleArtifactFilter&type=${`type`}")

CC @ghostbuster91