Add Sample.LinkIndex to pprofile (#12485)

This field was missed when setting up the latest proto generation.

---------

Co-authored-by: Pablo Baeyens <[email protected]>

Author: dmathieu

.chloggen/pprofile-sample-link-index.yaml

@@ -0,0 +1,25 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: pprofile
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Add LinkIndex attribute to the generated Sample type
+
+# One or more tracking issues or pull requests related to the change
+issues: [12485]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

pdata/internal/cmd/pdatagen/internal/pprofile_package.go

@@ -325,6 +325,12 @@ var sample = &messageValueStruct{
 			fieldName:   "AttributeIndices",
 			returnSlice: int32Slice,
 		},
+		&optionalPrimitiveValue{
+			fieldName:  "LinkIndex",
+			returnType: "int32",
+			defaultVal: "int32(0)",
+			testVal:    "int32(1)",
+		},
 		&sliceField{
 			fieldName:   "TimestampsUnixNano",
 			returnSlice: uInt64Slice,