Pass current Kotlin version to benchmark script

Allows using different current Kotlin versions in benchmark.
For example, SNAPSHOT version when current branch is master and
dev version on CI build.

^KT-49921 In Progress

libraries/tools/gradle/regression-benchmarks/benchmarkScripts/duckduckgo.benchmark.kts

@@ -1,13 +1,25 @@
 // Android application written in Kotlin:
 // - kind of big codebase
 // - uses Kotlin compiler plugins and kapt
-
 @file:BenchmarkProject(
     name = "duckduckgo",
     gitUrl = "https://github.com/duckduckgo/Android.git",
     gitCommitSha = "659bd5aaac1fba922a6df9053daa2b7bcd610375"
 )
 
+import java.io.File
+
+val stableReleasePatch = {
+    "duckduckgo-kotlin-1.6.10.patch" to File("benchmarkScripts/files/duckduckgo-kotlin-1.6.10.patch").inputStream()
+}
+
+val currentReleasePatch = {
+    "duckduckgo-kotlin-current.patch" to File("benchmarkScripts/files/duckduckgo-kotlin-current.patch")
+        .readText()
+        .run { replace("<kotlin_version>", currentKotlinVersion) }
+        .byteInputStream()
+}
+
 runAllBenchmarks(
     suite {
         scenario {
@@ -31,7 +43,7 @@ runAllBenchmarks(
         }
     },
     mapOf(
-        "1.6.10" to "benchmarkScripts/files/duckduckgo-kotlin-1.6.10.patch",
-        "1.6.20" to "benchmarkScripts/files/duckduckgo-kotlin-current.patch"
+        "1.6.10" to stableReleasePatch,
+        "1.6.20" to currentReleasePatch
     )
 )

libraries/tools/gradle/regression-benchmarks/benchmarkScripts/files/duckduckgo-kotlin-current.patch

@@ -27,7 +27,7 @@ index 4497fd12..730df20a 100644
  
      ext {
 -        kotlin_version = '1.5.10'
-+        kotlin_version = '1.6.255-SNAPSHOT'
++        kotlin_version = '<kotlin_version>'
      }
      ext.spotless = "5.14.0"
 -    ext.anvil_version = "2.3.3"
@@ -67,7 +67,7 @@ index fae6ae6e..81cb692c 100644
  version.io.reactivex.rxjava2..rxjava=2.2.9
  
 -version.kotlin=1.5.31
-+version.kotlin=1.6.255-SNAPSHOT
++version.kotlin=<kotlin_version>
  
  version.kotlinx.coroutines=1.5.2