opentelemetry-go: add new fuzz tests and change fuzzer naming pattern (#14250)

This PR add new fuzzers and renames fuzzer binaries in the OpenTelemetry
Go projects to include the module path as a prefix, improving clarity
and avoiding name collisions.

## Changes

### projects/opentelemetry-go/build.sh

- Added 3 new fuzzers: `FuzzHashKVs`, `FuzzTraceIDFromHex`, and
`FuzzSpanIDFromHex`
- Renamed fuzzer binaries to include module prefixes:
  - `FuzzHashKVs` → `sdk_attribute_FuzzHashKVs`
  - `FuzzGetBin` → `sdk_metric_internal_aggregate_FuzzGetBin`
  - `FuzzTraceIDFromHex` → `trace_FuzzTraceIDFromHex`
  - `FuzzSpanIDFromHex` → `trace_FuzzSpanIDFromHex`

### projects/opentelemetry-go-contrib/build.sh
- Added new fuzzer: `FuzzYAMLWithEnvVars`
- Renamed fuzzer binaries to include module and version prefixes:
  - `FuzzJSON` → `otelconf_v0.3.0_FuzzJSON`
  - `FuzzYAML` → `otelconf_v0.3.0_FuzzYAML`
  - `FuzzYAMLWithEnvVars` → `otelconf_v0.3.0_FuzzYAMLWithEnvVars`

## Benefits

- **Clearer naming**: Fuzzer binary names now indicate which module they
test
- **Avoid collisions**: Prevents potential name conflicts when multiple
modules have fuzzers with the same function name

Author: pellared

projects/opentelemetry-go-contrib/build.sh

@@ -14,8 +14,9 @@
 # limitations under the License.
 #
 ################################################################################
+REPO=$PWD
 
-pushd otelconf/v0.3.0
-compile_native_go_fuzzer_v2 $(go list) FuzzJSON FuzzJSON
-compile_native_go_fuzzer_v2 $(go list) FuzzYAML FuzzYAML
-popd
+cd $REPO/otelconf/v0.3.0
+compile_native_go_fuzzer_v2 $(go list) FuzzJSON otelconf_v0.3.0_FuzzJSON
+compile_native_go_fuzzer_v2 $(go list) FuzzYAML otelconf_v0.3.0_FuzzYAML
+compile_native_go_fuzzer_v2 $(go list) FuzzYAMLWithEnvVars otelconf_v0.3.0_FuzzYAMLWithEnvVars

projects/opentelemetry-go/build.sh

@@ -15,6 +15,18 @@
 #
 ################################################################################
 
-pushd sdk/metric/internal/aggregate
-compile_native_go_fuzzer_v2 $(go list) FuzzGetBin FuzzGetBin
-popd
+REPO=$PWD
+
+cd $REPO/attribute
+# Mitigate the error: found packages attribute_test and attribute in /src/opentelemetry-go/attribute.
+# Remove all Go files with *_test package before building the fuzzer.
+# Tracking issue: https://github.com/google/oss-fuzz/issues/7923.
+grep -rl --include="*.go" '^package .*_test' . | xargs rm -f 
+compile_native_go_fuzzer_v2 $(go list) FuzzHashKVs sdk_attribute_FuzzHashKVs
+
+cd $REPO/sdk/metric/internal/aggregate
+compile_native_go_fuzzer_v2 $(go list) FuzzGetBin sdk_metric_internal_aggregate_FuzzGetBin
+
+cd $REPO/trace
+compile_native_go_fuzzer_v2 $(go list) FuzzTraceIDFromHex trace_FuzzTraceIDFromHex
+compile_native_go_fuzzer_v2 $(go list) FuzzSpanIDFromHex trace_FuzzSpanIDFromHex