Update Java/Kotlin Gradle config file parser to support string interpolation in `build.gradle`

The following discussion from !164122 (merged) should be addressed:

• @lma-git started a discussion:

  Currently, Repository X-Ray doesn't support string interpolation in build.gradle either so this is not a priority to implement. We can address this in a follow-up:

Proposal

With a build.gradle that looks like:

ext {
    logbackVersion = '1.2.3'
    junitVersion = '4.12'
}

dependencies {
    implementation "logback:logback:$logbackVersion"
    testImplementation "junit:junit:$junitVersion"
}

The ConfigFiles::JavaGradle class should be able to parse the dependencies: logback (1.2.3) and junit (4.12)

Ensure KotlinGradle also supports string interpolation. Only plain string values should be interpolated; any nested interpolation is out of scope.

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added to epic &14100

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mentioned in merge request !164122 (merged)

changed milestone to %Next 1-3 releases

Hi @mnohr @derekferguson cc: @jordanjanes @emeraldjayde

Could we create a new epic for these kinds of issues (perhaps named "X-Ray enhancements")? In the near future, there will be several follow-up issues created to support other languages/configuration files, cleaning up minor tech debt, and building on/improving the in-monolith Repository X-Ray service after #476180 (closed) and #476177 (closed) are complete.

This makes sense to me, and as you said, there will be several follow-ups.

@lma-git @emeraldjayde @jordanjanes - I created Repository X-Ray Enhancements (&15196)

I could use some help adding new issues!

changed title from Update Java Gradle config file parser to support string interpolation in build.gradle to Update Java/Kotlin Gradle config file parser to support string interpolation in build.gradle

changed the description

removed from epic &14100

added gitlab-org#15196 as parent epic