[pkg/translator/azure] Map application-defined properties (#35402)

**Description:**

#33583 introduced support for traces in Azure Event Hub receiver.
However, application-defined properties have not been mapped. This PR
fixes this and adds the mapping for properties.

**Link to tracking Issue:**

**Testing:**

**Documentation:**

cc @deepan10

---------

Co-authored-by: joegoldman2 <[email protected]>
Co-authored-by: Sean Marciniak <[email protected]>

Author: joegoldman2

.chloggen/azuretranslator-app-props.yaml

@@ -0,0 +1,27 @@
+# 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. filelogreceiver)
+component: azuretranslator
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Map application-defined properties for trace signals
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [35402]
+
+# (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:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# 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: [user]

pkg/translator/azure/resources_to_traces.go

@@ -147,6 +147,12 @@ func (r TracesUnmarshaler) UnmarshalTraces(buf []byte) (ptrace.Traces, error) {
 		span.Attributes().PutStr("http.scheme", scheme)
 		span.Attributes().PutStr("http.method", azureTrace.Properties["HTTP Method"])
 
+		for key, value := range azureTrace.Properties {
+			if key != "HTTP Method" { // HTTP Method is already mapped to http.method
+				span.Attributes().PutStr(key, value)
+			}
+		}
+
 		span.SetKind(ptrace.SpanKindServer)
 		span.SetName(azureTrace.Name)
 		span.SetStartTimestamp(nanos)