Report OpenTelemetry Agentless SDK and integration (#4570)

#skip-changelog
## 📜 Description
<!--- Describe your changes in detail -->
Report OpenTelemetry Agentless SDK and integration

## 💡 Motivation and Context
<!--- Why is this change required? What problem does it solve? -->
<!--- If it fixes an open issue, please link to the issue here. -->
To have better stats on which ways of combining Sentry and OpenTelemetry are most used and make most sense to invest in.

## 💚 How did you test it?


## 📝 Checklist
<!--- Put an `x` in the boxes that apply -->

- [ ] I added tests to verify the changes.
- [ ] No new PII added or SDK only sends newly added PII if `sendDefaultPII` is enabled.
- [ ] I updated the docs if needed.
- [ ] I updated the wizard if needed.
- [ ] Review from the native team if needed.
- [ ] No breaking change or entry added to the changelog.
- [ ] No breaking change for hybrid SDKs or communicated to hybrid SDKs.


## 🔮 Next steps

Author: adinauer

sentry-opentelemetry/sentry-opentelemetry-agentless-spring/build.gradle.kts

@@ -30,6 +30,8 @@ buildConfig {
 tasks.jar {
   manifest {
     attributes(
+      "Sentry-Opentelemetry-SDK-Name" to
+        Config.Sentry.SENTRY_OPENTELEMETRY_AGENTLESS_SPRING_SDK_NAME,
       "Sentry-Version-Name" to project.version,
       "Sentry-SDK-Name" to Config.Sentry.SENTRY_OPENTELEMETRY_AGENTLESS_SPRING_SDK_NAME,
       "Sentry-SDK-Package-Name" to "maven:io.sentry:sentry-opentelemetry-agentless-spring",

sentry-opentelemetry/sentry-opentelemetry-agentless/build.gradle.kts

@@ -28,6 +28,7 @@ buildConfig {
 tasks.jar {
   manifest {
     attributes(
+      "Sentry-Opentelemetry-SDK-Name" to Config.Sentry.SENTRY_OPENTELEMETRY_AGENTLESS_SDK_NAME,
       "Sentry-Version-Name" to project.version,
       "Sentry-SDK-Name" to Config.Sentry.SENTRY_OPENTELEMETRY_AGENTLESS_SDK_NAME,
       "Sentry-SDK-Package-Name" to "maven:io.sentry:sentry-opentelemetry-agentless",

sentry/src/main/java/io/sentry/internal/ManifestVersionReader.java

@@ -21,7 +21,7 @@ public final class ManifestVersionReader {
   private static final @NotNull AutoClosableReentrantLock staticLock =
       new AutoClosableReentrantLock();
   private volatile boolean hasManifestBeenRead = false;
-  private volatile @Nullable VersionInfoHolder versionInfo = null;
+  private final @NotNull VersionInfoHolder versionInfo = new VersionInfoHolder();
   private @NotNull AutoClosableReentrantLock lock = new AutoClosableReentrantLock();
 
   public static @NotNull ManifestVersionReader getInstance() {
@@ -40,6 +40,9 @@ private ManifestVersionReader() {}
 
   public @Nullable VersionInfoHolder readOpenTelemetryVersion() {
     readManifestFiles();
+    if (versionInfo.sdkVersion == null) {
+      return null;
+    }
     return versionInfo;
   }
 
@@ -48,7 +51,6 @@ public void readManifestFiles() {
       return;
     }
 
-    @Nullable VersionInfoHolder infoHolder = null;
     try (final @NotNull ISentryLifecycleToken ignored = lock.acquire()) {
       if (hasManifestBeenRead) {
         return;
@@ -66,28 +68,32 @@ public void readManifestFiles() {
             final @Nullable String packageName = mainAttributes.getValue("Sentry-SDK-Package-Name");
 
             if (name != null && version != null) {
-              infoHolder = new VersionInfoHolder();
-              infoHolder.sdkName = name;
-              infoHolder.sdkVersion = version;
-              infoHolder.packages.add(
-                  new SentryPackage("maven:io.sentry:sentry-opentelemetry-agent", version));
+              versionInfo.sdkName = name;
+              versionInfo.sdkVersion = version;
               final @Nullable String otelVersion =
                   mainAttributes.getValue("Sentry-Opentelemetry-Version-Name");
               if (otelVersion != null) {
-                infoHolder.packages.add(
+                versionInfo.packages.add(
                     new SentryPackage("maven:io.opentelemetry:opentelemetry-sdk", otelVersion));
-                infoHolder.integrations.add("OpenTelemetry");
+                versionInfo.integrations.add("OpenTelemetry");
               }
               final @Nullable String otelJavaagentVersion =
                   mainAttributes.getValue("Sentry-Opentelemetry-Javaagent-Version-Name");
               if (otelJavaagentVersion != null) {
-                infoHolder.packages.add(
+                versionInfo.packages.add(
                     new SentryPackage(
                         "maven:io.opentelemetry.javaagent:opentelemetry-javaagent",
                         otelJavaagentVersion));
-                infoHolder.integrations.add("OpenTelemetry-Agent");
+                versionInfo.integrations.add("OpenTelemetry-Agent");
+              }
+              if (name.equals("sentry.java.opentelemetry.agentless")) {
+                SentryIntegrationPackageStorage.getInstance()
+                    .addIntegration("OpenTelemetry-Agentless");
+              }
+              if (name.equals("sentry.java.opentelemetry.agentless-spring")) {
+                SentryIntegrationPackageStorage.getInstance()
+                    .addIntegration("OpenTelemetry-Agentless-Spring");
               }
-              break;
             }
 
             if (sdkName != null
@@ -105,13 +111,12 @@ public void readManifestFiles() {
       // ignore
     } finally {
       hasManifestBeenRead = true;
-      versionInfo = infoHolder;
     }
   }
 
   public static final class VersionInfoHolder {
-    private @Nullable String sdkName;
-    private @Nullable String sdkVersion;
+    private volatile @Nullable String sdkName;
+    private volatile @Nullable String sdkVersion;
     private List<SentryPackage> packages = new ArrayList<>();
     private List<String> integrations = new ArrayList<>();