fix(deps): update dependency io.opentelemetry.proto:opentelemetry-proto to v1.8.0-alpha (#14572)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

dependencyManagement/build.gradle.kts

@@ -107,7 +107,7 @@ val DEPENDENCIES = listOf(
   "io.opentelemetry.contrib:opentelemetry-gcp-resources:${otelContribVersion}",
   "io.opentelemetry.contrib:opentelemetry-cloudfoundry-resources:${otelContribVersion}",
   "io.opentelemetry.contrib:opentelemetry-baggage-processor:${otelContribVersion}",
-  "io.opentelemetry.proto:opentelemetry-proto:1.7.0-alpha",
+  "io.opentelemetry.proto:opentelemetry-proto:1.8.0-alpha",
   "io.opentelemetry:opentelemetry-extension-annotations:1.18.0", // deprecated, no longer part of bom
   "org.assertj:assertj-core:3.27.4",
   "org.awaitility:awaitility:4.3.0",

examples/distro/smoke-tests/build.gradle

@@ -7,7 +7,7 @@ dependencies {
   testImplementation("com.fasterxml.jackson.core:jackson-databind:2.20.0")
   testImplementation("com.google.protobuf:protobuf-java-util:4.32.0")
   testImplementation("com.squareup.okhttp3:okhttp:5.1.0")
-  testImplementation("io.opentelemetry.proto:opentelemetry-proto:1.7.0-alpha")
+  testImplementation("io.opentelemetry.proto:opentelemetry-proto:1.8.0-alpha")
   testImplementation("io.opentelemetry:opentelemetry-api")
 
   testImplementation("ch.qos.logback:logback-classic:1.5.18")

examples/extension/build.gradle

@@ -103,7 +103,7 @@ dependencies {
   testImplementation("com.google.protobuf:protobuf-java-util:4.32.0")
   testImplementation("com.squareup.okhttp3:okhttp:5.1.0")
   testImplementation("io.opentelemetry:opentelemetry-api")
-  testImplementation("io.opentelemetry.proto:opentelemetry-proto:1.7.0-alpha")
+  testImplementation("io.opentelemetry.proto:opentelemetry-proto:1.8.0-alpha")
 
   testImplementation(enforcedPlatform("org.junit:junit-bom:5.13.4"))
   testImplementation("org.junit.jupiter:junit-jupiter-api")